A cohort is a group of players that you give different prices, rules or benefits to. Cohorts are not visible to players. They are how you tell Nettla who should get what.
What a cohort can contain
Membership types: everyone with that membership is in the cohort while it's active.
Company-wide membership types: if your club is part of a multi-club company.
Individual players: added by hand, by import or by a Smart Form.
Sub-cohorts: other cohorts inside this one.
Dynamic rules: players are added automatically based on gender, age or level.
For example: "Members" could contain your Silver and Gold memberships plus two coaches added by hand.
What you can use cohorts for
Cheaper prices in your price lists.
A longer advance booking window.
Different cancellation rules.
Courts or times only some players can book.
Activity prices and early registration.
Wallet prices.
Booking limits and member benefits.
Targeting announcements.
A full court discount.
Wherever you see the word cohort in the admin, you can set something different for that group.
Good to know
Cohorts are under Players → Cohorts.
A cohort can have start and end dates, so it only applies for a set period.
If a player is in several cohorts, they get the lowest price they qualify for.
See "How do I create a cohort?" and "How do I add or remove players from a cohort?".