The add-on uses OAuth authentication, a secure authentication method, in order to connect with Google Services – to enable add-on access and provide the requested data. This means that information regarding your Google login password, if requested, is only passed between your computer and Google servers, thus being completely private from the add-on.
The add-on will request to “connect to external service”. This is only to enable the functionality of fetch data from public url’s and Keywords-everywhere API.
The fetched data is passed from the public web pages & API directly to the add-on, after which the add-on writes the data to your Google Sheets. None of this data is stored anywhere else at any point in the process, which means none other than you (and any other users who have access to the respective Google Sheets) can see it.
The add-on does gather some information for statistical purposes. The following information is recorded:
E-mail address used with the add-on, for providing support with add-on issues