The loading of content on a website can take up quite a bit of resources, depending on what’s in it. However, when you throw in additional content such as ads, it can end up consuming even more resources, which can be a hinder to older or lower-end computers that might have less RAM, or to slower internet connections.
Google has in the past expressed their interest in blocking ads in Chrome that are deemed to be “bad”, also known as “abusive ads”, but it seems that the company could be taking it one step further by releasing a build of Chrome in the future that would also be capable of blocking resource hogging ads.
According to Google, it seems that these kind of ads only make up 1/10th of a percent of ads on the internet, which means that there is a very good chance you might not have encountered such ads. However, just to be safe, in the future Chrome will start to block ads that consume more than 4MB of bandwidth or ends up hogging CPU performance for 60 seconds or longer.
Sites that contain such ads will display empty boxes where the ads are displayed, along with an explanation as to why that ad has been blocked. These changes are expected to find their way into Chrome 76 or later, so do keep an eye out for it in the future.