Facebook offers a large audience for promoting products, but advertisers need to target the right people with the right message. To do this, businesses can sync data about potential customers between their Snowflake data warehouse and Facebook Ads using various methods. The manual method involves creating an audience from scratch, while the automated method uses Census reverse ETL to optimize and trust the automatic updates. Alternatively, businesses can use Facebook's Python API to sync data directly. To set up this process, advertisers need to create a Facebook Developer Account, app, and access token, and then configure settings such as audience name and retention period. The automated method with Census offers convenience and simplicity, but requires verification that the information is updated correctly without maintenance required.