You have an association and your members pay a membership fee each year. You want to arrange this as easily as possible. With the right rates, price indexations and discounts. With Memberships you reduce the invoicing process to a few clicks of the button. Have you also agreed on a direct debit? Then you collect the money at your (agreed) time.
Even if you want members to make a conscious choice to renew their subscription/membership, this is easy to set up. With Memberships you have an easy overview of which members have already paid, who still needs to be reminded and which subscriptions are expiring.