Remove and customize Checkout Forms

Hello Everyone! I'm trying to customize my checkout form on my website, but I'm running into an issue. I can't figure out how to delete the placeholder text in my check out required forms. For example, I would like to write an intro like this:

"Please provide your contact information below to ensure we can reach you regarding any important updates."

Then, I would place the name or phone number box after it, etc. However, after the text, it automatically places the placeholder text. How can I get rid of it?

Thank you in advance!

Thank you so much!