Hey, these are regional tickets and allow you to travel cheaper within a region. If you're going from one region to another there are different offers and if you travel long distance from one side of Germany to another, there are even more potential choices to make depending on how much money and time you're ready to spend. If you need to travel quick, it's better to take ICE (speed trains), they are very quick and possibly no changes will be required again depending on where you're, but they are very pricey unless you book them a few month earlier. If you have time you can find a much cheaper ticket, which will take you 2-3 hours longer and a few changes. :) so, use their app or official website www.bahn.com . But 25 euro is a very good price for a speed train even with a standing place! ;)