Tiny Tools › URL parameter glossary › fbclid
fbclidThe Facebook Click Identifier. Facebook attaches it to any link clicked from within Facebook or Instagram so Meta can connect that click to your later activity and to advertiser conversion data. One of the most common trackers you'll see on shared links.
Safe to remove? Yes. fbclid is used for tracking and reporting only — deleting it does not change the page you land on. Strip it before sharing a link to keep it clean and private.