Posted by BritneyMuller
After a short break, we’re back to share our working draft of Chapter 5 of the Beginner’s Guide to SEO with you! This one was a whopper, and we’re really looking forward to your input. Giving beginner SEOs a solid grasp of just what technical optimization for SEO is and why it matters — without overwhelming them or scaring them off the subject — is a tall order indeed. We’d love to hear what you think: did we miss anything you think is important for beginners to know? Leave us your feedback in the comments!
Chapter 5: Technical Optimization Basic technical knowledge will help you optimize your site for search engines and establish credibility with developers.
Now that you’ve crafted valuable content on the foundation of solid keyword research, it’s important to make sure it’s not only readable by humans, but by search engines too!
You don’t need to have a deep technical understanding of these concepts, but it is important to grasp what these technical assets do so that you can speak intelligently about them with developers. Speaking your developers’ language is important because you will likely need them to carry out some of your optimizations. They’re unlikely to prioritize your asks if they can’t understand your request or see its importance. When you establish credibility and trust with your devs, you can begin to tear away the red tape that often blocks crucial work from getting done.
Pro tip: SEOs need cross-team support to be effective
It’s vital to have a healthy relationship with your developers so that you can successfully tackle SEO challenges from both sides. Don’t wait until a technical issue causes negative SEO ramifications to involve a developer. Instead, join forces for the planning stage with the goal of avoiding the issues altogether. If you don’t, it can cost you in time and money later.
Beyond cross-team support, understanding technical optimization for SEO is essential if you want to ensure that your web pages are structured for both humans and crawlers. To that end, we’ve divided this chapter into three sections:
- How websites work
- How search engines understand websites
- How users interact with websites
Since the technical structure of a site can have a massive impact on its performance, it’s crucial for everyone to understand these principles. It might also be a good idea to share this part of the guide with your programmers, content writers, and designers so that all parties involved in a site’s construction are on the same page.
1. How websites work
If search engine optimization is the process of optimizing a website for search, SEOs need at least a basic understanding of the thing they’re optimizing!
Below, we outline the website’s journey from domain name purchase all the way to its fully rendered state in a browser. An important component of the website’s journey is the critical rendering path, which is the process of a browser turning a website’s code into a viewable page.
Knowing this about websites is important for SEOs to understand for a few reasons:
- The steps in this webpage assembly process can affect page load times, and speed is not only important for keeping users on your site, but it’s also one of Google’s ranking factors.
Imagine that the website loading process is your commute to work. You get ready at home, gather your things to bring to the office, and then take the fastest route from your home to your work. It would be silly to put on just one of your shoes, take a longer route to work, drop your things off at the office, then immediately return home to get your other shoe, right? That’s sort of what inefficient websites do. This chapter will teach you how to diagnose where your website might be inefficient, what you can do to streamline, and the positive ramifications on your rankings and user experience that can result from that streamlining.
Before a website can be accessed, it needs to be set up!
- Domain name is purchased. Domain names like moz.com are purchased from a domain name registrar such as GoDaddy or HostGator. These registrars are just organizations that manage the reservations of domain names.
- Domain name is linked to IP address. The Internet doesn’t understand names like “moz.com” as website addresses without the help of domain name servers (DNS). The Internet uses a series of numbers called an Internet protocol (IP) address (ex: 127.0.0.1), but we want to use names like moz.com because they’re easier for humans to remember. We need to use a DNS to link those human-readable names with machine-readable numbers.
How a website gets from server to browser
- User requests domain. Now that the name is linked to an IP address via DNS, people can request a website by typing the domain name directly into their browser or by clicking on a link to the website.
- Server sends resources. Once the server receives the request for the website, it sends the website files to be assembled in the searcher’s browser.
- Browser assembles the web page. The browser has now received the resources from the server, but it still needs to put it all together and render the web page so that the user can see it in their browser. As the browser parses and organizes all the web page’s resources, it’s creating a Document Object Model (DOM). The DOM is what you can see when you right click + “inspect element” on a web page in your Chrome browser (learn how to inspect elements in other browsers).
- Browser makes final requests. The browser will only show a web page after all the page’s necessary code is downloaded, parsed, and executed, so at this point, if the browser needs any additional code in order to show your website, it will make an additional request from your server.
- Website appears in browser. Whew! After all that, your website has now been transformed (rendered) from code to what you see in your browser.
Pro tip: Talk to your developers about async!
Something you can bring up with your developers is shortening the critical rendering path by setting scripts to “async” when they’re not needed to render content above the fold, which can make your web pages load faster. Async tells the DOM that it can continue to be assembled while the browser is fetching the scripts needed to display your web page. If the DOM has to pause assembly every time the browser fetches a script (called “render-blocking scripts”), it can substantially slow down your page load.
It would be like going out to eat with your friends and having to pause the conversation every time one of you went up to the counter to order, only resuming once they got back. With async, you and your friends can continue to chat even when one of you is ordering. You might also want to bring up other optimizations that devs can implement to shorten the critical rendering path, such as removing unnecessary scripts entirely, like old tracking scripts.
Now that you know how a website appears in a browser, we’re going to focus on what a website is made of — in other words, the code (programming languages) used to construct those web pages.
The three most common are:
- HTML – What a website says (titles, body content, etc.)
- CSS – How a website looks (color, fonts, etc.)
HTML: What a website says
HTML stands for hypertext markup language, and it serves as the backbone of a website. Elements like headings, paragraphs, lists, and content are all defined in the HTML.
Here’s an example of a webpage, and what its corresponding HTML looks like:
HTML is important for SEOs to know because it’s what lives “under the hood” of any page they create or work on. While your CMS likely doesn’t require you to write your pages in HTML (ex: selecting “hyperlink” will allow you to create a link without you having to type in “a href=”), it is what you’re modifying every time you do something to a web page such as adding content, changing the anchor text of internal links, and so on. Google crawls these HTML elements to determine how relevant your document is to a particular query. In other words, what’s in your HTML plays a huge role in how your web page ranks in Google organic search!
CSS: How a website looks
CSS stands for cascading style sheets, and this is what causes your web pages to take on certain fonts, colors, and layouts. HTML was created to describe content, rather than to style it, so when CSS entered the scene, it was a game-changer. With CSS, web pages could be “beautified” without requiring manual coding of styles into the HTML of every page — a cumbersome process, especially for large sites.
It wasn’t until 2014 that Google’s indexing system began to render web pages more like an actual browser, as opposed to a text-only browser. A black-hat SEO practice that tried to capitalize on Google’s older indexing system was hiding text and links via CSS for the purpose of manipulating search engine rankings. This “hidden text and links” practice is a violation of Google’s quality guidelines.
Components of CSS that SEOs, in particular, should care about:
- Since style directives can live in external stylesheet files (CSS files) instead of your page’s HTML, it makes your page less code-heavy, reducing file transfer size and making load times faster.
- Browsers still have to download resources like your CSS file, so compressing them can make your web pages load faster, and page speed is a ranking factor.
- Having your pages be more content-heavy than code-heavy can lead to better indexing of your site’s content.
- Using CSS to hide links and content can get your website manually penalized and removed from Google’s index.
- Your server can’t handle all the requests to crawl your content
From this page, enter the URL you want to check (or leave blank if you want to check your homepage) and click the “Fetch and Render” button. You also have the option to test either the desktop or mobile version.
In return, you’ll get a side-by-side view of how Googlebot saw your page versus how a visitor to your website would have seen the page. Below, Google will also show you a list of any resources they may not have been able to get for the URL you entered.
Understanding the way websites work lays a great foundation for what we’ll talk about next, which is technical optimizations to help Google understand the pages on your website better.
2. How search engines understand websites
Search engines have gotten incredibly sophisticated, but they can’t (yet) find and interpret web pages quite like a human can. The following sections outline ways you can better deliver content to search engines.
Help search engines understand your content by structuring it with Schema
Imagine being a search engine crawler scanning down a 10,000-word article about how to bake a cake. How do you identify the author, recipe, ingredients, or steps required to bake a cake? This is where schema (Schema.org) markup comes in. It allows you to spoon-feed search engines more specific classifications for what type of information is on your page.
Schema is a way to label or organize your content so that search engines have a better understanding of what certain elements on your web pages are. This code provides structure to your data, which is why schema is often referred to as “structured data.” The process of structuring your data is often referred to as “markup” because you are marking up your content with organizational code.
JSON-LD is Google’s preferred schema markup (announced in May ‘16), which Bing also supports. To view a full list of the thousands of available schema markups, visit Schema.org or view the Google Developers Introduction to Structured Data for additional information on how to implement structured data. After you implement the structured data that best suits your web pages, you can test your markup with Google’s Structured Data Testing Tool.
In addition to helping bots like Google understand what a particular piece of content is about, schema markup can also enable special features to accompany your pages in the SERPs. These special features are referred to as “rich snippets,” and you’ve probably seen them in action. They’re things like:
- Top Stories carousel
- Review stars
- Sitelinks search boxes
Remember, using structured data can help enable a rich snippet to be present, but does not guarantee it. Other types of rich snippets will likely be added in the future as the use of schema markup increases.
Some last words of advice for schema success:
- You can use multiple types of schema markup on a page. However, if you mark up one element, like a product for example, and there are other products listed on the page, you must also mark up those products.
- Don’t mark up content that is not visible to visitors and follow Google’s Quality Guidelines. For example, if you add review structured markup to a page, make sure those reviews are actually visible on that page.
- If you have duplicate pages, Google asks that you mark up each duplicate page with your structured markup, not just the canonical version.
- Provide original and updated (if applicable) content on your structured data pages.
- Structured markup should be an accurate reflection of your page.
- Try to use the most specific type of schema markup for your content.
- Marked-up reviews should not be written by the business. They should be genuine unpaid business reviews from actual customers.
Tell search engines about your preferred pages with canonicalization
When Google crawls the same content on different web pages, it sometimes doesn’t know which page to index in search results. This is why the tag was invented: to help search engines better index the preferred version of content and not all its duplicates.
The tag allows you to tell search engines where the original, master version of a piece of content is located. You’re essentially saying, “Hey search engine! Don’t index this; index this source page instead.” So, if you want to republish a piece of content, whether exactly or slightly modified, but don’t want to risk creating duplicate content, the canonical tag is here to save the day.
Proper canonicalization ensures that every unique piece of content on your website has only one URL. To prevent search engines from indexing multiple versions of a single page, Google recommends having a self-referencing canonical tag on every page on your site. Without a canonical tag telling Google which version of your web page is the preferred one, http://www.example.com could get indexed separately from http://example.com, creating duplicates.
“Avoid duplicate content” is an Internet truism, and for good reason! Google wants to reward sites with unique, valuable content — not content that’s taken from other sources and repeated across multiple pages. Because engines want to provide the best searcher experience, they will rarely show multiple versions of the same content, opting instead to show only the canonicalized version, or if a canonical tag does not exist, whichever version they deem most likely to be the original.
Pro tip: Distinguishing between content filtering & content penalties
It’s also very common for websites to have multiple duplicate pages due to sort and filter options. For example, on an e-commerce site, you might have what’s called a faceted navigation that allows visitors to narrow down products to find exactly what they’re looking for, such as a “sort by” feature that reorders results on the product category page from lowest to highest price. This could create a URL that looks something like this: example.com/mens-shirts?sort=price_ascending. Add in more sort/filter options like color, size, material, brand, etc. and just think about all the variations of your main product category page this would create!
To learn more about different types of duplicate content, this post by Dr. Pete helps distill the different nuances.
3. How users interact with websites
In Chapter 1, we said that despite SEO standing for search engine optimization, SEO is as much about people as it is about search engines themselves. That’s because search engines exist to serve searchers. This goal helps explain why Google’s algorithm rewards websites that provide the best possible experiences for searchers, and why some websites, despite having qualities like robust backlink profiles, might not perform well in search.
When we understand what makes their web browsing experience optimal, we can create those experiences for maximum search performance.
Ensuring a positive experience for your mobile visitors
Being that well over half of all web traffic today comes from mobile, it’s safe to say that your website should be accessible and easy to navigate for mobile visitors. In April 2015, Google rolled out an update to its algorithm that would promote mobile-friendly pages over non-mobile-friendly pages. So how can you ensure that your..