Enable pingbacks
When you enable pingbacks, you allow WordPress to send notifications to other blogs when you link to them in your content, and vice versa. For example, if you write a post and include a link to another blog, that blog will get a pingback notification. They can choose to display this notification as a comment, showing their readers that you have linked to their content.

It's a way of acknowledging the source and can help with networking and building relationships with other bloggers.