I get it but fb says :
Troubleshoot Conversion Optimization
If our
delivery system predicts your ad set is going to get none of the conversions you optimized for, we'll let you know so you can make adjustments before it starts running. This guide helps you figure out what the right adjustments are.
Is the conversion you're optimizing for happening frequently enough?
When optimizing for conversions, we recommend choosing one that happens about 50 times per week at a minimum. Our system needs that many to
learn from. Our system needs to learn so it can deliver your ad to the right people at the right time to get you the best results.
Important: In order for a conversion to count towards your 50, it has to happen within your chosen
attribution setting. For example, if you have a 1-day click attribution setting for purchase conversions and someone clicks your ad and completes a purchase 3 days later, that doesn't count towards the 50.
If your ad set is predicted to get zero conversions, you may not have chosen to optimize for one that happens frequently enough. To figure out the right one, check your pixel data. See how many times each event happens per week. If you're not seeing enough of any single pixel event, you may want to first focus on building up website traffic and a customer base.
Here are some ad set creation options we recommend trying if we predict your ad set will get zero conversions:
- Optimize for a more common conversion: It may be tempting to jump right to optimizing for purchases, assuming that's what you ultimately care about. However, purchases are the rarest type of conversion. If we predict you're going to get zero of your chosen conversion, try optimizing for a more common one instead. For example, instead of optimizing for purchases, optimize for adds-to-cart or page views. Both events are more likely to lead to a purchase than, say, someone engaging with a post on your Page, but may occur frequently enough that we can consistently get you that result. Purchases may not.
- Optimize for landing page views: This conversion event drives higher quality traffic than link clicks do, since a landing page view only occurs when the page you want to send people to loads. (If someone clicks a link, but then closes out your page before it loads, that counts as a link click, but not a landing page view.) However, it's still more common than most other conversion events. It's a good choice if you do need to build up more website traffic and a customer base.
If you're trying all of these but you're still predicted to get zero conversions, the problem may be elsewhere.
