You can upload your PGN to a private "Study" on Lichess. It allows annotation, engine analysis, and sharing. However, it struggles with databases larger than 1,000 games.
Building up your chess PGN isn't just about your games; it is about context. You need a "Reference Database" to compare your play against the giants of the game.
If you have multiple individual game files, you can open them in a text editor (like Notepad) and paste them one after another into a single Annotating: for good moves and for mistakes. Use braces to add text comments within the move list. Chess.com Help Center 4. Refining for Improvement Analyze Losses First: These contain the most data on your weaknesses. Target Bad Pieces:
: Mating Motifs (1 & 2), Double Check, Discovered Attack, and The Pin.