How do I do this?

image Like how to add this special background to glitch profile? @glitch_support Please give help?

Hi @anon6347983! In the top right corner of your profile ({your username}) there should be an “Upload Cover” button. That button will let you upload an image to use as a background. Let us know if you have any other questions!

What about the GIF that says "pls like + subscribe?

The GIF is part of @jenn’s profile description. To edit your description, go to your profile page and click on the description and you can edit it. The description and the title area supports Markdown. So you can include pictures (like the GIF), headings, links and lists using Markdown.