Pages with duplicate content, like printer-friendly versions, should be set as "noindex" to prevent confusion. Thin or low-quality content pages, such as placeholders or login screens, should also be excluded. Internal search results, tag/category pages, and user-generated content areas might be better off without indexing due to potential duplicate content e.g https://smamepestimate.com/ or spam concerns. Thank you/confirmation pages, sensitive content, and paginated/sorted versions of content can also benefit from not being indexed.