Reading CTR in context
CTR is one of the quickest signals of whether your message resonates with the people seeing it. Because it normalizes clicks against how many times something was shown, you can compare ads, subject lines or placements with very different reach. Just remember a click is only the first step, so always pair CTR with what happens after the click.
CTR across channels
Search, social, display and email all produce very different CTR baselines, so a number that looks low in one channel can be strong in another. Track your own trend over time and segment by audience and creative. A steady rise in CTR usually means your targeting and messaging are getting sharper.