When to use Bitwise Operators during webdevelopment?

My main use for bitwise operators could be relevant anywhere - representing a set of flags. For instance, you might have an integer in the database representing a set of security permissions for a user, and in your web app you would have to check those before continuing.

I'm going to be more explicit here because I think bitwise masks are a great tool that should be in any devs belt. I'm going to try to expand on the answers above. First, an example of using an integer to maintain state flags (common usage).

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