It specifically refers to a Spanish tradition of informal gatherings where people gather to engage in lively conversations, debates, and intellectual discourse on various topics. It can be a casual get-together with friends or family, or a more formal event with a specific topic of discussion.
Here are some other ways to translate "la tertulia":
* Chat session
* Conversation group
* Informal gathering
* Literary salon (if it involves more intellectual discussion)
The exact meaning can vary depending on the context.