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If you have not changed your Snapchat Ads attribution window, SourceMedium uses Snapchat’s default 28-day click, 1-day view window. If you change that Snapchat setting, SourceMedium reports the new window. For Meta, SourceMedium reports purchase conversions and revenue using the attribution setting on each ad set. Meta’s default for that setting is 7-day click, 1-day view. If you compare a different window in the Meta UI, the totals will not match. Ad performance also stores 1-day click, 7-day click, 28-day click, and 1-day view. The dashboard total uses the ad set setting, not those columns. To use one of those windows as the dashboard total, ask your account manager or integrations@sourcemedium.com. Meta removed the longer view-through windows from its API in January 2026, so only the one-day view window exists. To see which event each platform counts as a conversion, see What is reported as a conversion within the Marketing Overview?. If platform numbers still differ from the dashboard, see Why would external reports not match the SourceMedium dashboard?.