We completed an update to GeoNet over the weekend. This update was mostly focused on backend structure for some upcoming features, but the most visible improvement is the update email. By default each GeoNet member receives an update email once a week (normally on Thursdays). This can be changed to daily or twice a week from under your preferences - https://community.esri.com/user-preferences!input.jspa
The digest email was redesigned to create a more simple and engaging reading expereince. Below are the two main sections you will see:
Trending Now - This section contains mostly recent content from places you are following or are mentioned in; however, you will find a small percentage of content from other parts of the community.
Updates On Your Contributions - This section contains activity on content you have created.