What happens when you order
You put your link in the box and press the button. The next screen opens with it already filled in. You choose how many likes you want, pay, and the order starts after that.
Where to find it
Tap the share arrow on the post and choose Copy link. Old twitter.com links are fine.
Check this first
Protected accounts can't receive anything from outside. Your posts need to be public.
Why order Twitter (X) likes
A post that collects likes fast stands a much better chance of being shown to people who don't already follow you.