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 — Primary, Social, Promotions, Updates, Forums — 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.