I've applied for adsense and it's asking me to copy paste a code into my html after <head> tag, but when I go to wordpress theme editor, there are no HTML files only PHP files. Where do I put it? How do I connect my website to adsesne?
Best place for adsense is a sidebar, if your site has a sidebar then I suggest you, place ad code in the sidebar
Place the code just after the <head> tag. if you are using WordPress then you can use WordPress header and footer file editor plugin.