What is A/B test?

Also known as: Split test, Variant test

Definition

Compares two variants (A and B) of the same post, ad, or page to determine which performs better — measured against a specific KPI.

In-depth explanation

For agencies, systematic A/B testing delivers a 10-30% performance gain within 6 months. Test one variable at a time (hook, CTA, visual, hashtags). You need a minimum of 1,000 impressions per variant before a conclusion is statistically reliable.

Example from agency practice

Test: caption variant A ("Save for later") vs B (no save CTA) across 4 posts. Result: saves +40% on variant A. The agency now makes the "save" CTA standard in its evergreen content.

Especially relevant for

  • Strategists
  • Social media managers
Senly

One platform for your entire agency workflow.

Client portal, content planning, AI captions, white-label reporting — all in one tool. Try it free for 14 days.