Deliverability & the inbox
Gmail promotions tab
Also known as: gmail tabs · promotions filter
Gmail's automatic tabbing system that moves promotional marketing email into a separate Promotions tab rather than the main Primary inbox: algorithm-driven, no declared rule, mostly based on sender reputation and message content signals.
Gmail's tabbed inbox spans five tabs: Primary, Social, Promotions, Updates, Forums. It is algorithmic, not rule-based. Gmail evaluates every message against signals including sender reputation, content (promotional language, image-heavy HTML, unsubscribe link presence), and the individual recipient's interaction history. Promotional marketing email almost always lands in Promotions, and operators often overstate the problem. Studies of real cohorts show Promotions-placement correlates weakly with engagement loss, because users who opt into marketing email also check the Promotions tab. The false "fix" is to disguise promotional content as transactional; Gmail detects this and downgrades trust. The real fix is to earn Primary placement by building engagement: reply-forwarding, high-value-per-send cadence, and strong sender reputation. Promotions is not a deliverability failure. It's appropriate categorisation of marketing mail, and Gmail users open it.