It is possible to get better at chess by studying established chess tactics and examining previously played games from famous chess players. Practicing against other opponents is also a crucial aspect of the process.
As is the case with any other skill, the most important aspect of improving your chess game is to study the basics. Numerous books and websites exist that explain the concepts behind every level of chess playing. As well as providing an understanding of the base rules, such as how each piece moves and what moves are and are not allowed, these books cover numerous strategies and fundamental concepts. Studying these fundamentals allows players to avoid common mistakes and traps, and even begin to employ these traps against their opponents.
Studying famous chess games improves your own chess game because it shows various strategies and techniques in action. Seeing a tactic in action is very different from reading about it, and it provides much-needed context to often nebulous concepts. Many famous games have detailed analyses written about them that explain why the players made the moves they did. This is very useful for learning how to choose the appropriate strategy against different tactics in a game.