Borderlands 2 GOTY is a package which contains the main Borderlands 2 and some other DLC editions which are included in the Season Pass.

Salient Features of The Product-

The package comprises the following-

• The base Game is Borderland 2.
• All the DLC extensions that are constituent of the Season Pass- 
• Ultimate Vault Hunter Upgrade Pack 1
• Sir Hammerlock's Big Game Hunt 
• Captain Scarlett and Her Pirate's Boot 
• Tiny Tina's Assault on Dragon Keep
• Mr Torgue's Campaign of Carnage
• Gaige the Mechromancer 
• The Vault Hunter's Relic 
• Kreig, the Psycho 
• One Golden Key
• The Skins and the Heads included in the Collector's Edition
• The Gearbox Gun Pack 
• The Creature Slaughter Dome

Note that The GOTY Edition doesn't comprise anything released after its announcement; it may be the Head Hunter DLCs or the Ultimate Vault Hunter Upgrade Pack Two: Digistruct Peak Challenge. 

About the base Game- Borderlands 2: 

This Game marks the beginning of a new era where shooting and looting will begin. In this Game extension, you can play as one of the four crypt hunters who are supposed to face off against the entire new world full of creatures, evil geniuses or psychos. Isn't it exciting? Interact more and make some new friends. Ornate them with a variety of weapons. You get to fight with them in a four-player co-op who have begun an expedition on a continuing Quest for retaliation and retrieval across the unexplored and unforeseeable living planet.

Key Features of the Game-

1. New Characters and Brand New Classes: There are four new playable classes which include the Commando, the Assasin, the Siren, and the Gunzerker.
2. 87 Bazillion- A new gun system is introduced. Also, the newly generated Relics, shields, class mods, grenades, and much more are fascinating.
3. Reforming Co-op online and LAN
4. Brand new opponents and enemies
5. New environments on Pandora: 

So, what are you waiting for? Buy Borderlands 2 GOTY edition to enjoy access to multiple games simultaneously. The most thrilling and adventurous gaming experience is waiting for you. Also, do not forget to check out some other DLC extensions of the Borderland franchise, such as Borderlands 2 Season Pass, Borderlands 2: Mr Torgue's Campaign of Carnage DLC, Borderlands 2: Tiny Tina's Assault on Dragon Keep DLC, Borderlands GOTY DLC (no main Game), Borderlands The Pre-Sequel - Lady Hammerlock The Baroness DLC and many more.