Setting Domain Preferences
These are set for all sites. Google uses this simple method to decide whether a site is displayed with a www header in SERP listings. URLs can suffer from minor errors such as capitalization errors that can cause duplication errors. If the same web korean whatsapp page is typed three times and each time different letters are capitalized, the search engine would count all three pages as different and treat them as duplicate content. A rel=canonical implementation tool used on the 2nd and 3rd URL would help direct search engines to the 1st listing and treat the remaining two as identical copies of the first.
No Index Command (Follow)
If a site has pagination issues, a meta robots tag with noindex follow values can be implemented on those pages. It will allow those specific pages to be crawled by search engine robots but will prevent them from being included in indexes.
More duplicate content removal methods
Make sure internal links are built consistently throughout the construction of any website. When sharing information with other sites, confirm that the linked content links directly to the original content. Do your best to minimize the amount of similar content on any website. If a page is overwhelmingly similar, consider combining the pages or adding distinct, dynamic content that differentiates the pages. Clean the site of duplicate content by removing the pages from the indexes using a removal tool through Google, Bing, or with a metabot.