Continuing on my email all the things project for Repeat Customer Insights, it's now possible to subscribe to a specific customer Cohort and receive email updates every week or month.
That will let you monitor a group of customers and follow how their purchases evolve over time. e.g. how new customers from Black Friday buy.
All Repeat Customer Insights accounts with access to the cohorts can setup these emails now. There's no limit on the number of cohorts you can monitor or the number of email recipients.
If you haven't tried the app yet, it comes with a 14-day free trial so you can see how it helps before paying.
Analyze your customer behavior
A quick and automatic way to measure your customer behavior is with Repeat Customer Insights. It'll automatically import your Shopify data and run a number of analyses to highlight different customer behavior.