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Unless a page can give value to a searcher (not just an existing customer) it shouldn't be in Google's search index. Sometimes I like to go back to the basics. Remember that search engines exist to help people find information that they WANT to find. Realistically, people are not going to want to find every page on your websites in SERPS.I suggest you ask yourself this question; does this page offer information that someone would actually want to search for, and make your decision accordingly. p.s. Having said all of that, I'll answer your question. The answer is yes, having thin pages on your site can hurt your domain. If your pages offer value to searchers, I suggest you improve them instead of remove them, but if they don't offer value to searchers don't waste your time, and just no-index them.