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  • Writer's pictureBelden Digital

Website Speed: The Key to Technical SEO Success

Website speed is a crucial aspect of technical SEO. It has an effect on user experience but is also quite important for search engine rankings. A slow loading website can lead to high bounce rates and low conversion rates, which can harm your search engine rankings. In this blog post, we will discuss various aspects of website speed and how they impact SEO.

How Search Engines Measure Website Speed

Search engines use various metrics to measure website speed, including:

  1. Page load time: This is the amount of time it takes for a page to fully load and be ready for user interaction. Search engines use this metric to determine how quickly a page can be accessed by users.

  2. Time to first byte (TTFB): This is the amount of time it takes for the first byte of data to be received by the browser after a user requests a page. TTFB is a measure of how quickly the server can respond to a request.

  3. Time to interactive (TTI): This is a performance metric that measures the time it takes for a web page to become fully interactive after the user initiates a navigation action. It's an important metric for measuring website speed and user experience because it represents the point at which the user can start interacting with the website. TTI is calculated by the browser, and it starts when the user first requests the website and stops when the browser finishes processing all the event listeners and JavaScript code that may block user input. TTI is different from other loading metrics like First Contentful Paint (FCP) and Speed Index (SI) because it takes into account the interactivity of the page.

  4. Speed Index: This is a measurement of how quickly the contents of a page are visibly populated.

  5. First Contentful Paint (FCP): This is a performance indicator that gauges how long it takes the browser to display the first piece of text or image. It marks the point at which a user can begin consuming the content on the page, making it a crucial indicator for assessing website speed and user experience.

  6. Cumulative Layout Shift (CLS): This is a performance metric that measures the visual stability of a website. It measures the unexpected layout shifts that occur during the loading of a web page, and how much the layout of the website changes.

These metrics help search engines determine the overall speed of a website and how it impacts the user experience. Additionally, Google has also introduced Core Web Vitals, which are a set of metrics that measure the loading, interactivity and visual stability of a page. These metrics are considered important for providing a good user experience.

website speed

How to Optimize Website Speed

There are several ways to optimize website speed resulting in an enhanced user experience, including:

  1. Compressing images: Optimizing images by compressing them can significantly reduce their file size without compromising on quality. This can help reduce the time it takes for a page to load.

  2. Minifying code: Minifying code involves removing unnecessary spaces, comments and code from HTML, CSS and JavaScript files. This can help reduce the size of the files, which can help speed up page load times.

  3. Using a content delivery network (CDN): A CDN is a network of servers that are distributed around the world. By using a CDN, your website's content can be delivered to users from a server that is closest to them, which can help reduce page load times.

  4. Enabling browser caching: Browser caching allows a browser to store a copy of a website's files so that they can be quickly retrieved the next time a user visits the site. This can help reduce page load times for repeat visitors.

  5. Using a good hosting service: A good hosting service can help ensure that your website loads quickly. Consider using a hosting service that offers solid-state drives (SSDs) which are faster than traditional hard drives, and has a good uptime guarantee.

  6. Optimize your code: Make sure to write efficient and clean code, this way the browser can load and render the page faster.

  7. Using lazy-loading: Lazy-loading is a technique that defers the loading of non-critical resources until they are needed. This can help reduce the number of requests made to the server, which can help speed up page load times.

  8. Using AMP (Accelerated Mobile Pages): AMP is an open-source framework that helps create fast-loading mobile pages.

It's important to note that website optimization is an ongoing process and there are other things that you can do to improve your website's speed, like regularly monitoring and analyzing your website's performance, and testing different optimization techniques.

The Impact of Mobile Website Speed

Mobile website speed has a significant impact on the user experience and search engine rankings. Here are a few ways that mobile website speed can impact your website:

  1. User experience: A slow loading mobile website can lead to frustration among users, causing them to leave the site quickly. This, in turn, can lead to high bounce rates, which can harm your search engine rankings.

  2. Search engine rankings: Search engines, such as Google, place a high emphasis on mobile-friendliness and speed. A slow loading mobile website can harm your search engine rankings, making it harder for users to find your website.

  3. Conversion rates: A slow mobile website can negatively impact the user experience, which can lead to lower conversion rates. This can harm your business by reducing the number of sales or leads generated from your website.

  4. Mobile-first indexing: Google has implemented mobile-first indexing, which means that the mobile version of your website will be used as the primary version for indexing and ranking. This means that if your mobile website is slow, it will negatively impact your search engine rankings.

  5. User engagement: A slow mobile website can lead to poor user engagement, as users may not be willing to wait for the website to load. This can lead to a lower number of page views and longer sessions, which can harm your search engine rankings.

It's important to note that mobile internet usage has surpassed desktop usage, and many users tend to access the internet via their mobile devices. Therefore, ensuring that your website is optimized for mobile, including website speed, is essential for providing a good user experience and for maintaining good search engine rankings.

The Future of Website Speed

Website speed will continue to play a crucial role in technical SEO. The use of artificial intelligence and machine learning to optimize website speed is expected to become more common in the future. As technology continues to advance, we can expect to see the following trends in website speed in the future:

  1. Increased focus on mobile website speed: As more and more users access the internet via mobile devices, we can expect to see a greater emphasis on mobile website speed.

  2. Use of artificial intelligence (AI) and machine learning (ML): These technologies can be used to analyze website data and optimize website speed. They can also be used to predict and prevent issues that can slow down a website.

  3. Progressive web apps (PWA): PWAs are web apps that can be accessed like a website but also have the capabilities of a native app. They are designed to work offline and load fast. PWAs can provide a faster, more responsive and reliable user experience than traditional web pages.

  4. 5G networks: As 5G networks become more widely available, website speed will be impacted positively because of faster download and upload speeds. This will enable larger and more complex websites to load faster.

  5. Use of edge computing: Edge computing is a distributed computing paradigm that brings computation and data storage closer to the location where it is needed, to improve response times and save bandwidth. Websites can use edge computing to keep the website loading fast and reduce latency.

  6. Use of WebAssembly (WASM): WebAssembly is a binary instruction format for a stack-based virtual machine that allows web developers to run low-level code on web browsers. This will enable the development of more complex and powerful web applications that run faster in web browsers.

Website speed will continue to be an important aspect of website design and development. With new technologies and trends emerging, it's important to stay up-to-date on the latest developments in website speed to ensure that your website provides a good user experience and maintains good search engine rankings.


Website speed is a vital aspect of technical SEO. It not only impacts the user experience but also plays a critical role in determining search engine rankings. By optimizing website speed, you can improve the user experience, increase conversions and boost your search engine rankings. If you want to improve your website's speed, start by analyzing your website speed, identify the areas that need improvement and implement the appropriate optimization techniques.

If you are looking to improve your website's speed, consider working with Belden Digital, we’ve helped a variety of clients from every industry reach their marketing goals. Contact us today to get information on SEO services that will help your website rank higher in search engines.

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