If you clicked �search connections� using the input for a round trip on the previous page, you should see a page with this information.  It should be pretty self-explanatory.  Note that all train here are fast Intercity Express trains (ICE).  The first two connections involve one change of trains; the last connection is direct.
If you only input a time and date for one way, the page would look almost the same, but instead of �Choose return trip� it would say �Order�.  If you click over the start and stop stations, you will add to the page a piece that looks like the one below.
Note that you have a change of trains in W�rzburg.  You have only 6 minutes between arrival and departure, but this is plenty of time, because this is a �cross-platform� connection.  5 and 4 are opposite sides of the same platform.  4/a/b is used because sometimes short trains only use only one end of that platform (eg 4a).  As long as you are at the end of the car, ready to get off, you will have plenty of time.  The train to Munich probably will not even arrive for few minutes.  The conductor will not start the Munich train until everyone in sight has boarded.

If you had entered a round trip and chosen one of the connections on the first connections page, you would now see a page like this.
You can order a Normal fare ticket, refundable, usable on any similar (ICE) or lower class (IC, EC, reg) train by clicking on "Order", or you can check the availability of Savings fares by clicking "Check availability".  Savings fares are limited in quantitiy and do sell out.  If all Savings fare 50 tickets are sold out, they may offer you Savings fare 25 tickets at a higher price, but still less than Normal fare.
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