What's the difference between branches, salesrooms and outlets of travel agencies? What is the connection?

The difference is that the branch of a travel agency is a branch of a travel head office, and the outlets may be branches of larger travel agencies or small travel agencies themselves. Travel agency outlets are propaganda windows for travel agencies to attract tourists, and sometimes they also play the role of outlets. But the qualifications are different. Branches and outlets of travel agencies can independently carry out tourism business, but outlets cannot.