– The Conversion Window Changes or Attribution will be set to 7-day click and 1-day view as default (from 28 day/1 view). This means the number of leads/purchases attributed to Facebook ads will be reduced (by up to 50% by some estimates), and therefore the amount of data available to manage and optimize these campaigns will be reduced
– There will be an (up to 3 days) delay in available data in the ads manager, again affecting the management and reporting on the campaign.
– Retargeting capabilities, which can be some of the most profitable campaigns to run, will also be impacted and audiences will be smaller – anyone who opted out of tracking will not be able to be retargeted!
– Granular reporting will be limited – eg demographic breakdowns will no longer be available
– Facebook ads are going to potentially look less profitable as viability is lost on conversion data.
– Managing Facebook ads is going to take more skill. The Facebook AI is going to have less data to work with and so potentially ads manager will become more manual. (Currently, Facebook advises each ad set needs 50 conversion events per week before the AI can really kick in. Hitting the 50 number is going to become harder.)