The share of people who did something with your content beyond scroll past it. Likes, comments, shares, clicks. Useful as a relative signal within a channel. Less useful across channels, because the action types aren't comparable. A comment on LinkedIn is not the same as a click on a display ad. High engagement rate on low reach is a niche win. Low engagement rate on massive reach may still be moving business. Context matters more than the number.
Ad tech glossary
Engagement Rate
Technical definition
The percentage of people who interacted with your content (likes, comments, shares, clicks) divided by the total number of impressions or reach.
The ADLINGO translation
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