Let's return to the concept of "crawling budget", where crawlers spend n time crawling the site. If the robot "sees" that the content is regularly repeated, the indexing will take much longer or may stop altogether. The search engine will consider the content to be of poor quality, will not see the point in scanning it at all or often.
Not only pages, but also content can be duplicated. Duplicate content — duplicate content on different pages of the site (often found on Macedonia Email List pagination, filter or sorting pages. Here is an example of duplicate content on pages that are not blocked from indexing recommend Duplicate content on the filter page

Duplicate content on a category page Errors in the site code. The search engine must process the HTML code. If the pages are made in JavaScript, the search bot will not be able to recognize them, process them and add them to the cache of the search engine.