What this video covers
Every setting on the VIP Tier Settings page, opened with Settings at the top of a tier's perks page: turning VIP on or off (0:12), Milestone Type and Minimum order value (0:25), the Tier Evaluation Period (1:00), Expirations (1:25), the two checkboxes for moving down and renewals (1:50), the recurring reset (2:19), and the tag fields under Allowances and Restrictions (2:46). It explains the save bar and when every customer's tier is recalculated (3:13), and ends on your store (3:29), where the VIP card shows each tier.
In short
Open it with Settings at the top of any tier's perks page. Deactivate VIP turns the whole program off at once and the VIP card leaves your store; Activate VIP turns it back on and recalculates every customer's tier.
Milestone Type is what customers do to reach a tier: Points earned, Amount spent or Orders placed, where cancelled and fully refunded orders don't count. For Orders placed, Minimum order value sets the lowest order total, after refunds, that counts; leave it empty to count every order. If you switch, each tier keeps its number, so update each tier's milestone and text on its perks page.
Tier Evaluation Period is how far back to count: LifeTime, One calendar year, Custom (a Program Start Date and an optional Program End Date) or Rolling period (Look Back in months or years). With No expiration, customers keep a tier until they reach a higher one, so the evaluation period only decides who moves up. A Custom expiration makes a tier expire a set Interval after it's reached, then checks the customer again, and you can turn on the VIP Tier Expiring Reminder email to tell them a week before. A tier's perks page can set its own expiration.
Remove tier points when a customer moves down a tier takes back that tier's bonus points, but not points already spent. Give tier rewards again when a customer renews their tier gives the rewards and bonus points again each time a tier expires and the customer still qualifies, so it needs a Custom expiration. Reset the VIP program on a recurring cycle starts everyone over on the same dates, so customers lose their tier at each reset until they reach a milestone again; while it is on, the evaluation period and expiration choices lock.
Enable VIP Program only for customers with tags and Restrict VIP Program for customers with tags decide who is in: customers left out get no tier, lose one they already have and don't see the VIP card on your store (with an allow list, guests don't see it either). A change that affects who qualifies, like the milestone type, the evaluation period or the tags, recalculates every customer's tier after you save.