[Treborika]

Insourcing refers to the creation of content to your website or social media channels by yourself while
Outsourcing is the creation of the content to your website or social media channels by a hired person who do it on your behalf.

[Fergal]

You seem to have answered the question yourself Treborika, did you have anything else in particular in mind?

[Mika]

When I started as a blogger, I outsourced content because I wanted the best content that would help me rank on Google in a month. These days I mainly do it myself (insourcing)