Sec,ch,ua,mobile:,?0 Guide

The header sec-ch-ua-mobile: ?0 is a that tells a web server the request is coming from a desktop device .

: It follows the Structured Field Values format, using a question mark followed by a boolean: ?0 : Desktop (False). ?1 : Mobile (True). sec,ch,ua,mobile:,?0

: Include interactive elements that rely on mouse-hover actions, which don't exist on touchscreens. The header sec-ch-ua-mobile:

: It is part of the Privacy Sandbox initiative to reduce the information leaked by traditional "User-Agent" strings. sec,ch,ua,mobile:,?0

The ?0 value is a boolean indicator where 0 means "false" (not a mobile device). If you are "drafting proper content" based on this header, your server-side logic should prioritize and features. Content Strategy for ?0 (Desktop)