Permalink All customers
You’ll find this option under WooCommerce -> B2B Market -> Customer Groups -> All Customers.
This option is best understood as a global alternative to customer groups. It enables you to set basic and bulk prices that apply to ALL customers (including customers and guests).
Be careful with this option. When in doubt, you’re always better off keeping things simple by creating a customer group.
B2B Market always works according to the principle of “the lowest price wins”. If your global discount is higher than the discount set for a customer group it is the global discount that will be applied.