Data Blending in Looker Studio: How to Combine Multiple Data Sources

Data blending combines multiple sources into a single chart — showing marketing spend from Google Ads alongside revenue from Shopify and traffic from GA4.

How It Works

Blending works like a SQL LEFT JOIN. Select a primary source, add secondary sources, define a join key (usually date). The result is a virtual combined dataset. For GA4 setup, see our GA4 guide.

Common Scenarios

Blend Google Ads + Meta Ads by date for unified spend. Blend Shopify + GA4 for true conversion rates. Blend CRM + marketing for cost per lead. See our sales funnel guide.

Pitfalls

Mismatched join keys cause silent failures. Ensure formats match. For blank results, check our blank chart guide.

Blending vs BigQuery

Blending is quick for small datasets. For large volumes, BigQuery joins are more reliable. Contact us for a free data architecture consultation.