To view a deck in detail, go to your Decks page and click on the deck you want to see. If your decks are displayed in a grid, click the cover art or title. If your decks are displayed in a list, click the deck title.
On a deck's Details page, you can view:
the deck's value
the cards in the deck, in a variety of arrangements
The Details page is also where you can edit:
Finally, the Details page is where you can access:
the Build page for the deck, to add or remove cards
the deck's statistics
the Export/Share page for the deck