Was ist eine Bitcoin Code-Überprüfung?

Could you please elaborate on what a Bitcoin code verification entails? As a cryptocurrency enthusiast, I'm interested in understanding the technical details behind this process. Is it a way to ensure the integrity of the Bitcoin network? Does it involve scrutinizing the codebase for any vulnerabilities or security issues? How frequently does such a verification take place? And what are the potential implications if any vulnerabilities are discovered? I'm keen to learn more about the security measures surrounding Bitcoin and its underlying technology.