Log in to your account, open the profile of the vendor you worked with, and click Leave a Review. Give your rating and write a few lines. It takes two minutes.
You need a free account to leave one, and reviews should come from couples who actually used the vendor.
What makes a review useful. Specifics. “They were great” helps nobody. Say what actually mattered on the day.
Did they reply quickly while you were planning, or did you have to chase? Did they arrive when they said, and did the number of people who turned up match what was agreed? Did the final result match what you were shown when you booked? Were there extra costs you were not expecting? Would you hire them again, and if not, what would have changed that?
Fair criticism is welcome. Honest reviews are the whole reason The Aisle is worth using, and a site with only five star reviews is a site nobody believes. Say what went wrong if something did. Keep it true and keep it about the service rather than the person.
Vendors on paid packages can reply. That is deliberate. A vendor who answers a critical review well often reads better than one with no criticism at all.
When to write it. Within a few weeks, while you still remember the detail. Waiting for the photos back is fine, but do not wait a year.
Your review is what the next couple uses when they are deciding whether to trust someone. Somebody wrote one for you.