OAuth consent is a permission step that lets one app request limited access to another service on your behalf. For example, a calendar tool may ask to read events from your Google Account. The app usually does not need your Google password, but the permission you grant can still be sensitive.
A useful example
A simple scheduling tool asks to read and change all of your mail. That is broader than its stated purpose. Do not approve it until you understand why it needs that access and trust the developer. If you already approved it, review the connection in your account's security settings and remove access if unnecessary.
What removal means
Revoking a grant stops future access through that connection, but may break a feature and may not delete data the app already copied. Changing your account password is a separate action and does not replace reviewing connected apps. Google's
third-party access guide explains permission scopes and removal. Treat a familiar-looking consent screen as a real security decision, not a routine continue button.
Practical distinction
Read the specific permission request, not only the app's name. An app can be legitimate yet request more data than the feature you want requires.