Google made an announcement that it added a search appearance filter to the new beta version of the Google Search Console, which lets users filter out search data for Web Light users. In an explanation by Google, Web Light is when Google will “transcode (convert) web pages on the fly into a version optimized for slow networks, so that these pages load faster while saving data.”
As Barry Schwartz said, one of his sites shows that, 22 percent of the time it came up in the search results, Web Light was utilized to speed up pages for those users. The site in question recieved traffic from India, as well as other countries that had generally slower internet speeds.
The following is a shot of the filter: