Node owners can earn action points by participating in certain action items, such as running a node for a minimum of 6 hours per day. This is called Proof of Action, which recognizes contribution and energy usage tied to a given blockchain. The Rewards page of your Switch Web App is where you will see a breakdown of the action points completed by your individual nodes. The points you earn determine the amount of Switch Rewards you earn. This is determined as a % of the action points you earned vs the total number of action points earned by all participants during that distribution period.
This will not be a 1:1 exchange of action points to Switch Rewards. As of now, you will only see the action points in your Rewards dashboard, which are not the same as Switch Rewards. Switch Rewards are coming soon, this is step one in the process of distribution.