It also asks me to use the app.
I was trying to look up the company where I was thinking of applying, but it said I needed to sign in to view the review, so I entered some fake information. Once I was signed in I went back to the page thinking I could read the review, but now I need to write a review before I get access to Glassdoor!
I’d wager he means something like the fediverse, reddit, various microblogging sites. There are plenty sharing experiences working for Google, Apple and what not.