Session Zero
Source GM Core pg. 9
Some groups prefer to have everyone create their characters in advance and show up ready to play. However, getting the group together to make characters can be fun and can benefit your game down the line. A session for building characters is commonly called “session zero.” Session zero is typically shorter than other game sessions, so you might plan a short introductory scene for when everyone has finished building their characters or just hang out and do something else after you've planned your characters.
Having a session zero lets players share character details, making it easier for their characters to have links and relationships with one another before the adventure starts, and gives players the chance to become invested in each other's characters by organically learning what decisions other players made. It also enables the players to ensure a variety of skills and abilities are represented across the whole adventuring party and plan strategic synergies between their characters. These sessions also give veterans the chance to help less experienced players through character creation. Lastly, session zero can give you a better understanding of the characters and help the players integrate them into the adventure in interesting ways.
Having a session zero lets players share character details, making it easier for their characters to have links and relationships with one another before the adventure starts, and gives players the chance to become invested in each other's characters by organically learning what decisions other players made. It also enables the players to ensure a variety of skills and abilities are represented across the whole adventuring party and plan strategic synergies between their characters. These sessions also give veterans the chance to help less experienced players through character creation. Lastly, session zero can give you a better understanding of the characters and help the players integrate them into the adventure in interesting ways.