Impressions

What are impressions?

Every time your post loads on someone's screen, that's an impression. A single user scrolling past your tweet three times in a day generates three impressions. The same user seeing the post in their feed and again in their notifications: two impressions.

It's the most generous count of "views" a network reports.

Impressions vs reach

• Reach = unique people (1,000 followers saw the post → 1,000 reach)
• Impressions = total views (those 1,000 people saw it twice on average → 2,000 impressions)

The ratio between them tells you how often each viewer comes back. A high impressions-to-reach ratio (3x+) usually means your post is showing in feeds repeatedly — common for paid posts and posts that the algorithm keeps reshowing to engaged users.

When to lean on impressions

• Frequency-driven goals: if the message needs repetition (a launch, an event date), impressions matter more than reach
• Paid campaigns: most ad platforms bill on impressions (CPM = cost per 1,000 impressions)
• Comparing posts within the same audience: when reach is roughly constant, impression delta tells you which posts the algorithm decided to surface more

For organic engagement-rate analysis though, default to reach as the denominator — impressions overcount and make the rate look weaker than it is.