_gcl_au
Used by Google Ads to measure advertising effectiveness.
_gcl_aw
Used by Google Ads to store click information and attribute conversions.
_gcl_gs
Used by Google Ads conversion linker to store click information.
_fbp
Used by Facebook Pixel to deliver, measure, and improve advertisements.
_fbc
Used by Facebook Pixel to store the last click identifier from Facebook ads.
_ttp
Used by TikTok Pixel to distinguish unique visitors and measure ads.
_tt_enable_cookie
Used by TikTok Pixel to remember that cookies are enabled for tracking.
ttcsid
Used by TikTok Pixel to keep a session identifier for events.
ttcsid_*
Used by TikTok Pixel to keep a per-pixel session identifier (for example ttcsid_XXXX).
_ttclid
Used by TikTok Pixel to store the click identifier from TikTok ads.