People want to be able to find answers to their questions as fast as possible — studies show that people really care about the speed of a page. Although speed has been used in ranking for some time, that signal was focused on desktop searches. Starting in July 2018, page speed will be a ranking factor for mobile searches.
Browser engineers have been optimizing their engines using Speedometer as a proxy for real-world use of popular frameworks for a number of years. Now Webkit and Chromium teams are announcing the Speedometer 2.0.