Create an authority site
When building a new website or blog, you may want to buy an expired domain instead of a new one. With the latter, you will have to build everything from scratch to establish its authority. You will also have to work with new content and backlink so that you can gain domain age authority with time. When working expired domain, you can leverage its SEO value for gaining better ranking quickly or hire an seo services to rank higher.
Expired domains can be used for backlinking purposes
Rather than making a complete website from scratch, you can also make a mini website just for the sake of linking it to your main website. The gist is to transfer the link juice that the old domain has to your main website via this very backlink. Here, you may have to add some content for making this website seem natural. This can be done with the help of PBN Method or Private Blog Networks. They make the most of the expired domains to install various mini sites linked to one primary website. You may need multiple websites, as domain diversity is essential for backlinks. If the relationship between these sites is hidden, like same IP address and not being hosted on the same server, it may seem that these websites are unrelated and are organically linked to your main website. This is an excellent way to create backlinks instead of writing guest posts for the blogs which or may or may not accept your contributions.