Link exchanges are programs in which one site offers to link to another site in return for a reciprocal link.The key component of a link exchange is the requirement for a reciprocal link.
Link exachange is good when the page to which your linking has a high authority, trust, meaning it ranks high in search engines, which will add value to your site as well. Usually sites having the domain extension ".edu"&".org"are considered to provide high value links. However links from authoritative sites are not easy to obtain.
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