'What is the best way to move two HTML elements around on a page with CSS so they overlap?

Whenever I want to be able to make two things overlap (like an image over another image or something), using margin or padding works but it can make other things not work properly (like text not going to the next line or not being able to make other things overlap anymore). I want to know this for future use in any project, not really a specific one so I don't have a code snippet.



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