Reasons for merger Wikipedia:Merging

wp:mergereason
wp:overlap

there several reasons merge pages:

merging should avoided if:

merging—regardless of amount of information kept—should leave redirect (or, in cases, disambiguation page) in place. needed allow proper attribution through edit history source page. superfluous redirects not harm anything, , can helpful in finding articles, e.g. alternative names.

you may find or of information merged in destination page. fine; can feel free delete redundant information , add new material. if there no information added destination page, can redirect other page there, please make clear in edit summary.