When modeling your data, sometimes you have other data sources such as Google Spreadsheet, Google Analytics or even a CSV. Normally you would require a custom ETL job to pull those data into tables in your data warehouse, and then you can create models on those tables.
With Holistics's Third-party Model feature, you can do everything in a single flow. Simply click Create -> Add Data Model from Other Sources -> Select a Third Party Source.
For more information, please refer to our public docs: https://docs.holistics.io/docs/third-party-models