Frequency measures how consistent a user is over time in interacting with your brand. More frequent interactions means a higher score.

This serves as a measurement of user regularity. Do they visit once a week? Once a day? Once a lifetime?

Since this score is relative to all your users, you can easily target your most frequent users, rather than something like "users who visited in the last week", which will vary wildly in size.

Again, this score has a fixed range of 0 to 100. All the scores are like this. It is how we can continuously update user profiles without having to update segment definitions.