What is caption?

The text that goes with a post.

A caption completes the visual, adds context and ends with a call to action. The first line must be strong enough to earn the “more” tap.

Instagram captions are limited to 2,200 characters; keywords in the caption help you get found in search.

Updated: October 12, 2026 · All terms

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IZY Social writes posts in your brand's voice, publishes them at the right time and reports the results.