The two sides
Microsoft Ads (Bing)
Turn on auto-tagging in Microsoft Advertising, create an active offline conversion goal for each event, connect your account in SignalBridge, and map each SignalBridge event to a goal. When a visitor who clicked a Microsoft ad converts, SignalBridge uploads the conversion with the msclkid, goal name, time, value and currency. Events without an msclkid are not sent.
Read the Microsoft Ads (Bing) 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.