Web beacon
METHOD USING SERVER METRICS FOR A SERVED UNOBTRUSIVE FILE TO ASCERTAIN WHETHER A PAGE HAS BEEN LOADED AND BY WHOM
Webbug; 1-by-1 GIF; 1x1 GIF; Web beacons; Tracking bug; Pixel tag; Clear gif; Single Pixel Gif; Tracking Bug; Clear GIF; Null picture; Web Beackons; PattyMail; HTML bug; 1×1 gif; Tracking pixels; Page tag; Javascript tag; Web bugs; Beacon (internet); Internet beacon; Web bug; Web tag; 1×1 GIF; JavaScript tag; Facebook pixel; Facebook Pixel; Tag (web tracking); One pixel image; Pixel method; IVW pixel; Counter pixel; Counting pixel; Ivwbox; IVW Pixel; Tracking Pixel; Pixel Tag; One-pixel image; Beacon API
A web beaconAlso called web bug, tracking bug, tag, web tag, page tag, tracking pixel, pixel tag, 1×1 GIF, or clear GIF. is a technique used on web pages and email to unobtrusively (usually invisibly) allow checking that a user has accessed some content.