A data source is a place where data comes from and is connected to your account or reporting tools. This can be a Google product, an uploaded file, or a third-party integration.
Examples of data sources include platforms like Google Analytics, BigQuery, HubSpot, or imported spreadsheets and product feeds. These sources provide the information that Google Ads and reporting tools use for targeting, optimization, and performance analysis.
Having the right data sources connected helps improve reporting accuracy and allows automated systems to make better optimization decisions.