Update src/connections/reverse-etl/reverse-etl-source-setup-guides/bigquery-setup.md

Co-authored-by: forstisabella <[email protected]>

Author: gilsegment

src/connections/reverse-etl/reverse-etl-source-setup-guides/bigquery-setup.md

@@ -3,6 +3,8 @@ title: BigQuery Reverse ETL Setup
 redirect_from:
   - '/reverse-etl/bigquery-setup/'
 ---
+To set up your BigQuery source with Reverse ETL, you must [construct a BigQuery role and service account](#constructing-your-own-role-or-policy] and [create a BigQuery source in the Segment app](#set-up-bigquery-as-your-reverse-etl-source). 
+
 > info "BigQuery Reverse ETL sources support Segment's dbt extension"
 > If you have an existing dbt account with a Git repository, you can use [Segment's dbt extension](/docs/segment-app/extensions/dbt/) to centralize model management and versioning, reduce redundancies, and run CI checks to prevent breaking changes.