All glossary terms
Glossary · Engagement
Reach
The number of unique users who saw a tweet (not the total times it was shown).
In depth
Reach differs from impressions: if the same user sees your tweet three times, that's three impressions but one reach unit. X doesn't expose reach as a standalone metric for most accounts — you have to estimate it from impressions and your unique-viewer ratios.
Reach is what marketers usually mean when they say "how big is your audience." Impressions inflate easily through algorithm boosts to existing followers; reach measures genuine distribution.
Now put it to work
AutoTweet generates and schedules X content tuned for the algorithm — the same one this glossary just explained.