Website Integration, what type of app

I’ve been asked to look into using the API to pass form entries to Pipedrive but I’m a little confused about what type of “App” it would be. The documentation says you need to register the app and that it has certain requirements, including a smooth install and uninstall.

I may be a bit premature in asking this as I haven’t been given access to a developer account and it may make more sense when I see the actual registration form but a website doesn’t seem to fit with the app requirements so what type of app would it be.