Ration is an item that allows you to automatically clean locations and get resources from them without visiting the zones themselves. Rations can be used on the global map, by doing so, you will see a list of items received, these objects will then be transferred to your inbox, the number of rations you have can also be seen right there. If you did not find the resources in the inbox immediately, don’t worry, it just means that you will receive them the next time you use the rations (you will receive resources for both uses at once, for the current one and previous one).