The name stands for LinkedIn first-party ad tracking ID. It appeared as browsers phased out third-party cookies, moving LinkedIn's click tracking into the URL itself.
The destination's LinkedIn Insight Tag picks the token up, stores it in a first-party cookie, and attaches it to conversion events sent back to LinkedIn's Conversions API. Since LinkedIn accounts are real-name professional identities, the match it enables is unusually precise: this person, this job title, this company, clicked this ad and then did this.
Is it safe to remove?
Yes. Attribution-only; pages render identically without it.
Remove li_fat_id automatically
Rather's Link Shortener strips li_fat_id and hundreds of parameters like it, right in the
address bar and in everything you copy or share. Free, open source, no account,
no data collection, and the page you are on never breaks: the cleanup happens
after the site has already loaded.
LinkedIn's first-party ad tracking identifier, appended to ad clicks so the destination site's Insight Tag can report your actions back to LinkedIn.
Is it safe to remove li_fat_id from a URL?
Yes. It is an attribution-only token and pages render identically without it.
How do I remove li_fat_id automatically?
The free, open-source browser extension Rather's Link Shortener removes li_fat_id automatically in the address bar, in copied links, and in shared links, on Chrome and Firefox. You can also simply delete the parameter by hand: everything from li_fat_id= up to the next & or the end of the URL.