Brugge Train station to hostel

Its about a 20 minute walk:
https://goo.gl/maps/cU4qqipvamK2

Or else take the bus. Their internet site you gave a link for, mentions three bus lines from the railway station.

Try to avoid following these instruction on your mobile, but it might work well enough. I used my desktop:

If you look at the little Google map that's on your linked page, you'll see a popup with the link saying "Routebeschrijving". You can sort of guess that means "show how to get there." When you click on it, you get a full page Google map. In the top left section is an angled arrow that says "Directions" (this time in English, because it's on your own computer.)

Click on the arrow. In the starting location box, where your cursor will already be. As a guess, start to type in "Station". Google is smart enough to know you are interested in Brugge, so it offers "Stationsplein Bruges Belgium". Approve that offer.

Now pick the "pedstrian" figure at the top, to show you the shortest (but not only ... ) walking route.

Although Google is less than perfect about public transit, if you select the little train picture, you'll get some suggestions. Click on the label "Schedule Explorer" to see some details, and warnings about how far you'll still have to walk.

There is a vending machine outside the station where you can buy NMBS bus tickets. You'll need Euro coins or small bills. Your best purchase might depend on how many days you'll be there. You might want to explore the distance to the main sights of Bruges, by clicking the "Reverse Route" on the left panel, and then replacing Stationsplein with "Belfry" or "Cathedral", which Google may correct to the Dutch spelling for you. Another approach would be to wait and get suggestions for transit cards from the reception at the Hostel.

What has happened with humankind that we can't find our way on a clear map without the assistance of Google Maps?

In fairness to the OP, the Hostel itself posted a Google Map on its website. In walking around New York City a few times a week. I have noticed that young people no longer learn "how" to get somewhere, but rely exclusively on real-time directions received from their cell phones.

To me, that's parallel to learning to run a word-processor from the keyboard-shortcuts, rather than understanding the menu and design structure of the product. But the direction-finding seems worse, because it means you don't "learn" something that could come in handy the next day or the next month. You simply get delivered to your destination without any other "gain". You also likely overlook the other sights that you walked past, which you might want to visit another day. OTOH, it can be very difficult to know when to get off a strange bus with just the name of a stop. Even if the signs on the waiting shelters are clear, they are not visible until too late, and are often obscured by other signs, or even decals on the bus windows.

The last time I found a brick-and-mortar bookstore, the printed maps were pretty darned expensive. I don't blame any traveler for using an electronic map that "wants to be free." And once you're there, the phone's GPS is going to be displayed.

... the hostel itself posted a Google Map on its website.
That's what amazed me: a clear map on their website and the OP still asks for directions. How difficult can it be?

It's only 1.08 miles (a little less than 2km) from the train station. Look it up on google maps, then print it out. If walking, it appears Stationsplein turns into Ketsbruggestraadt which runs into R30. Cross the R30 and pick up Vaartdijkstraadt (seems to be a bike path). Stay on it until there is a pedestrian bridge across the canal. Cross the canal and go left onto Lapeersfortstraat. Follow it and when it comes up to Baron Ruzettelaan, Hostel Europa will be directly across the street. From the pedestian bridge to the hostel is 2/10 of a mile. You may want to look at it using google street view so you know what it looks like before arriving.

Learn to use Google Maps on a smart phone - it's a huge time saver in my experience. After years of trying to figure out bus schedules and maps on the fly , using Google Maps on my phone has saved me an enormous amount of time on recent trips trying to get places by walking or by bus.

You can use Google Maps not just in this one case but in many other cases too.

But looking it up now, looks like you can take bus #20 or #21 from the station to the hostel to save most of the walking.

Bus 95 also works. You can get the bus at platform 6 at the train/bus station (busses 20, 21, and 95).