This service is automatic, it starts within 1-72 hours after the order.
Enter your Instagram post link, then enter the useame of the account whose followers you want to tag onto that post, and the number of people you want tagged. They will then be tagged onto your post. This is the best marketing method on Instagram because you can target a specific audience from a similar/competitor account.
Remember, in order to mentions correctly the profile must be open! If you have a closed profile, open it before ordering!