We are planning on writing a bit more about this, but the feature is still a bit new it will probably be a little while, sorry.
Basically, you can go to the WooCommerce/Payments/Vipps settings and find the Vipps Checkout tab. Scroll down, and you can turn on the Bring integration, as well as PostNord etc. For some of these you may need an account with the shipping company in question.
When this is on, you can then go to the normal WooCommerce Shipping section and find your shipping zone. You can there turn on the extended Bring option, ie letting the user choose delivery point. This will then be visible in Vipps Checkout (only – this feature will not work with Express Checkout yet).
The customer should then be able to choose Posten in the Vipps Checkout screen, and there select delivery points etc. When the purchase is complete, the choice the customer made will be added as shipping metadata, which is available on the order screen and can be used by integrators too, though this will require some development.
A better description of this is forthcoming, but hopefully this will help for the time being.