This metric is very important since it becomes one of the primary factors of ranking on Google. It is therefore necessary to understand what the CLS is in order to be able to optimize it. What is the CLS? CLS refers to the movement of the various El Salvador Email List elements present on a web page. This displacement occurs when the page is being downloaded . It is caused by loading: fonts, images, see videos, or even contact forms … In short, everything that relates to the content to be displayed . To avoid any inconvenience to the user, it is important to minimize the CLS as much as possible.
Indeed, simply moving text can adversely affect the user experience . There are several reasons that Google says creates a layout mismatch. Indeed, the latter occurs because of: of non-sized pictures , dynamic content, Google ads, of the different fonts used on the web. It is important for the images to have dimensions of height and width registered in the HTML code. This detail helps you improve user experience and minimize CLS . In the case of dynamic images, the size of all the images must use the same aspect ratio. For its part, Google is doing everything to help you minimize your CLS as well. Indeed, the search engine is satisfied with specific spaces to install its ads. Thus, if you correctly set the (document division) element that is supposed to host Google ads, you greatly reduce the CLS .
What are the impacting elements?
The ad, having a specific height and width, is limited to its insert and offers a better user experience. Dynamic content is a specific element added to a web page. For example, it is possible to link to a YouTube video or any other external source in WordPress. The program then displays the element as a built-in dynamic object. By properly tagging this content, you significantly reduce the CLS. Finally, poorly optimized web fonts also create a lag problem when loading the web page. To avoid this type of problem, it is important to check that the rel = “preload” command is present when downloading the font in question. The calculation of the CLS involves two particular events: the proportion of impact and the proportion of distance .
The impact proportion is the measure of the space occupied by an unoptimized element of a window. As that item downloads and moves, its initial location, as well as its final location, is calculated by the metric . Thus, when an element occupies 50% of a display window and then, following loading, gains an additional 20%, the two values are added together. The proportion of impact is then expressed as a score. For our example, the score for the impact proportion would be 0.70. The other measure is the proportion of distance. This is expressed based on the amount of space generated by the movement of the element on the page. Thus, the distance proportion takes into account the home position and the end position . In the example we took previously, this proportion of distance represents 20%.
How is the Cumulative Layout Shift calculated?
To calculate the CLS, the algorithm is based on a multiplication of the two data. Thus, our example gives us the following formula: 0.70 x 0.20 = 0.14 Of course, to this score are added many other mathematical parameters. Here, we want to simplify the calculation in order to properly popularize what the CLS is. However, the score obtained by this calculation is a very good way to measure the user experience . cls calculation Other ways to measure it There are other ways to measure CLS. Indeed, webmasters use simulations to calculate the user experience score. Theoretically, they simulate a real user browsing a web page . Using Chrome Dev Tools, for example, it’s possible to get as close as possible to a page’s theoretical CLS score. These simulations are ideal for understanding how a layout works.
The webmaster, before putting the site online, checks the proper functioning of the web page before distributing it to users. In this way, he visualizes layout problems and resolves them instantly. The importance of the CLS in 2021 Today more than ever, the user experience is an element to be respected . With this in mind, it is important to take into account all the parameters that considerably improve the experience that your user has on your website. If the layout shift was not a priority for Google , in 2021, it becomes and is part of the long list of parameters to be respected to maintain itself in the SERPs ranking . While it is not necessary to carry out the calculation of the CLS score on your own, it is very important to understand that it becomes an additional criterion on the Internet.