Member levels can be used to give certain members more privileges than others. You can grant/restrict a member level's access to features, sections of the community. You can also assign levels that have moderation or administrative capabilities. One of your member levels must be marked as the "default level". When new members sign up, they will automatically belong to this level. You can change a specific member's level by editing their account details from the View Members page. If you want all members in your community to have the same features and limits, you will only need a single member level (aside from the Super Admin level).