How i can exclude a collections item's from all de pages

I’m new in this and i don’t know how i can exclude a collection item from all the pages, can someone help me, please?
Soy nueva en esto y no se como excluir una lista de todas las paginas, me podrian ayudar?, porfavor

Here is my public share link: [LINK][1]
(how to access public share link)

It’s a process.
• First, you have to remove all instances of the element on your template page(s) and any other spots where the data currently displays.
• Then go into each post and remove data from the field associated with the element you want to remove.
• Then you can remove the field in Collection > Collection Settings > Collection Fields (it won’t let you remove until the first two steps are completed)

How do i do it?

Because i’m new of this, and i don’t know how to do some stuff’s