It lists all of the quests in Grizzleheim. You can click on a quest there to get more details on it.
You get access to different areas based on your level.
For example, you can go to Vigrid Roughland at Level 25, if you finished the previous area.
This might help too:
Quests to Return to Grizzleheim:
Level 20 – Trade Voyage (go to Northguard and Savarstaad Pass) Level 25 – Lending a Paw (go to Vigrid Roughland) Level 30 – Full Grizzle Jacket (go to Mirkholm Keep) Level 40 – The King and I (talk to Valgard GoldenBlade). He gives you “The Bigger They Are” (go to Nidavellier to defeat Jotun)
Then comes Ravenscar and Wintertusk.
And here is some extra info. This link has a guide for Zeke's quest to find the Yardbirds:
There are details for each location, and the maps have a green arrow pointing to the locations. But don't forget, you can't go into an area to get them until you unlock that area by doing your Main Quests.