There are many different types of careers in the PR field. There is in-house PR and out of house PR. In-house PR is when you're actually working for the brand in house, meaning at their company. Out of house PR is working for an agency, and that is a PR agency that represents multiple types of clients.
Now, you have those two sub-categories. There's also many different types of public relations. So, you could be a celebrity publicist. You could be a brand publicist. You could be in event planning, event PR. So there's multiple different avenues, oh, even to corporate PR. You've got corporate and business PR.
So there's multiple different ways and avenues that you could go, if you are interested in a career in PR.