Board the bus at any of the 21 stops located around the city. Present your ticket, settle in either downstairs or on the open-air top deck, and listen to the engaging commentary offered by the audio guide (earphones provided).
Hop off at the first destination that piques your interest, which could be the Royal Palace, the Vasa Museum, City Hall, or Old Town—the bus travels to all of Stockholm's most important sights.
With a ticket valid for 24 hours, you can spend as little or as much time as you wish at each place—with regularly scheduled buses running from morning through early evening, you never have to worry about getting to the next stop.
After 24 hours of exploration, conclude your tour where you choose. Now that you have a good sense of the city, you can continue exploring independently.