There is a WP page about syndication.
"Syndication refers to the websites providing information
and the websites displaying it. For the receiving site,
content syndication is an effective way of adding greater
depth and immediacy of information to its pages, making it
more attractive to users. For the transmitting site,
syndication drives exposure across numerous online platforms.
This generates new traffic for the transmitting site — making
syndication a relatively cheap, free and easy form of advertisement."