How to add pixcel code to specific element in wordpress page?

[Hercu1es01]

hey, I need to install taboola's conversion event pixel into the buttons of my own landing pages. I have tried it by installing it into the specific page via myphpAdmin, wp_posts, and then page type = page (image below). This would get me to the code of a specific page, but I think changes there seem to not affect the page.

Any