Fluent Forms have many features for notifying admins when somebody submits a form. As in you can get an instant email / SMS, or send your data to your CRM automatically or even get a notification in your Slack channel. But it is very hard to track them individually when you have hundreds of submissions or a few submissions from an old form.
So for this reason, a new Weekly Email Summary feature has been introduced. You will get a summary of your form submissions, on a particular day every week. And also get an overall idea of how your forms are performing.
The site admin will get the email every Monday, by default. But you can still change the day & custom emails from Fluent Forms->Settings->Email Summaries. And you can always disable this feature if it’s not what you needed it to be like.
