It's a common phrase used in French, especially when introducing something, such as a meal, a presentation, or a discussion.
Here are some examples:
* Pour commencer, nous allons parler du projet. (To start, we will talk about the project.)
* Pour commencer, je voudrais vous présenter mes collègues. (To begin, I would like to introduce you to my colleagues.)
* Pour commencer, voici le menu. (To start, here is the menu.)