do I post the same article on every site?

[Linked]

So I am having confusion with SEO, if I post a blog on my site, and I want to guest post on other sites to increase domain authority, should that content be completely different to the content on my site to avoid duplicate content?

[shamalsundar]

Yes, Should not use the same content which used for blog. It should be different form the site for posting in other sites.