https://vnexpress.net/
The number and quality of backlinks contribute greatly to the search engine optimization (SEO) ranking of a website. Search engines use backlinks to determine a website's authority and relevance by pointing them to other websites. It isn't enough to just have backlinks; search engines need to index them as well. Services that index backlinks are available in this situation. You can use a backlink indexing service to make sure that search engines index your backlinks. In this way, your backlinks are submitted to different indexing services for indexing and search
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