Test my tracking

1. Click Test my tracking. Your store opens in a new tab in debug mode, for that tab only (?ecart_debug=1; open a page with ?ecart_debug=0 to end it).
2. Open the browser console (F12, then Console). Each event (view_item, add_to_cart, begin_checkout, purchase and the Meta and Google Ads equivalents) is listed with the tracker it went to. "(not loaded)" means that tracker is not on the page, usually because consent was not given or its ID is wrong.
3. In Google Analytics open Admin → DebugView: debug-mode visits show there within seconds. In Meta Events Manager use Test events.
4. Place a test order (cash on delivery works) and refresh Tracking status: Last purchase reported shows the order.

Product IDs in these events match your Google and Facebook feeds (an option of a product is <product id>_<option id>), so dynamic remarketing and catalogue ads can show the exact product.