What has changed on the website?

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Was there a particular day when things worsened?

7. Is stock availability for your key products or categories okay?

8. Look at browsers and mobile devices to see if there are any issues with the conversion rate on specific devices.

9. Also check if there are any differences in the main customer journeys to purchase.

If it's a channel issue
1. If it's a channel issue, for example Facebook, map the funnel for chinese singapore phone number list Facebook and repeat the deep dive. 2. Look at the last two weeks, and two weeks from a time when things were really good. Map the funnel again, but this time from a channel perspective: work from the top down, not the top down.

2. You may want to export your data and group it by Similar Adsets if you create many duplicates of the same adset within your 2-week periods (I generally don't recommend this if you can avoid it. It's better to rotate ad creative and keep your old campaigns or ad sets for quality score history).