Data Studio Community Connectors enable direct connections from Data Studio to any internet accessible data source. The connectors listed on this site are tightly integrated with your Google account and the data stored in said account. When installing a connector, you will be prompted to authorize different accesses to your Google account. Those authorizations will only be used to display in Data Studio the data you have selected.
Data Studio Community Connectors are created and powered by Google Apps Script, on Google servers.
Information gathered by the connectors will never be sold or shared to external people. Your data never leaves Google servers. They are not stored by us in any external database. They can be cached on Data Studio side.