Publish a detailed writeup of one CVE your product would have caught

Pick a recent, publicly disclosed CVE relevant to your customers' environment. Write a technical post explaining the vulnerability, how it could be exploited, and the specific detection or prevention step your product provides against that exact vulnerability class, with screenshots of the relevant alert or control.

Why it works: Security practitioners read CVE analysis for the technical depth, and demonstrating relevant coverage in that context reaches them while they are already thinking about the risk.