What is Reach vs impressions?

Also known as: Reach vs views

Definition

Reach is the number of unique people who saw a post; impressions is the total number of times a post was shown, including multiple views by the same person.

In-depth explanation

The difference between reach and impressions matters because they tell different stories. An Instagram post with 1,000 reach and 1,500 impressions means 1,000 people saw it, on average 1.5 times each. A post with 1,000 reach and 5,000 impressions means 1,000 people saw it 5 times — that post "stuck" or went viral within a small circle.

Agencies use impressions mainly for repeat exposure (brand awareness) and reach for unique coverage (growth and new audiences). For client reports, reach is usually the better measure — clients grasp "how many people saw my post" more easily than "how often it was seen".

Example from agency practice

A carousel post from client X has: reach 3,200, impressions 5,800. Conclusion: roughly 3,200 unique people saw the post, on average 1.8 times each. A good ratio — the algorithm showed the post to people more than once.

Especially relevant for

  • Strategists
  • Social media managers
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