This update means that more of your pages will display speed scores.
Likely, this change also means scores will be generated faster when launching ads that point to newly published landing pages.
Google was not specific about how many ad clicks are now required to generate a mobile speed score.
Mobile speed score is evaluated on a 10-point scale, 1 being very slow and 10 being extremely fast.
Calculating factors that go into mobile speed score include the page speed and potential conversion rate.
Google Ads introduced the mobile speed score in July 2018. This is the first major change in how the score is calculated since it launched.
Google offers other tools to evaluate mobile page speed include the Speed Scorecard, which compares mobile speed against competitors, and the Impact Calculator also estimates the potential revenue lost as a result of having a slow mobile site.