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 arrow on the right side of the video, then Copy link. The short vm.tiktok.com version is fine.
Check this first
Your TikTok has to be a public account. Private accounts block likes, views and follows from strangers.
Why order TikTok likes
TikTok shows a new video to a small test audience first. How that audience reacts decides who sees it next. Likes that arrive while that test is running count for the most.