Hi Sidharth,
The Tilemap is an important tool if you want to create a game with tiles. Placing tiles manually can be fairly exhausting. The Tilemap tool can speed up your workflow a lot.
However, that depends on the game. If your game does not need any tiles, it would not make any sense to add tile sprites.
If you plan to complete the TileVania project, I would recommend to not skip the videos on tiles and the tilemap because they are essential in this project. Generally, it is better to know that something exists than to not know it. Spend a couple of minutes with “boring” things. Maybe you’ll need the tilemap in one of your future games. 
Did this help?
See also:
- Forum User Guides : How to mark a topic as solved