SignalBridgeThe two sides
Google Ads
Create an offline (import) conversion action in Google Ads for each event you want, connect your account in SignalBridge, and map each SignalBridge event to its action. SignalBridge then uploads each conversion with the click ID, value, currency, order ID and consent signals. An event uploads only if it carries a Google click ID or consented email or phone.
Read the Google Ads referenceBigCommerce
In Script Manager create a script with the location set to all pages, paste your SignalBridge snippet, and make sure the store uses Optimized One-Page Checkout so scripts can load on checkout and the order confirmation page. Connect your ad platforms, place a test order, and check that one Purchase appears with the right value. If the total is missing, send the order yourself with sb_track from an order confirmation script.
Read the BigCommerce referenceThis pairing does not have a step-by-step guide of its own yet. The two references above cover the connection, the events and the limits for each side.