user11410: I have a pgn file containing a game. I want to add a comment into the game (like at move 23. - This is a ok move etc.) using words and not symbols. Is it possible  to do this?

user825: [Date "1910.01.07"]
[Result "1/2-1/2"]
[White "Carl Schlechter"]
[Black "Emanuel Lasker"]

1. e4 {Notes by J. R. Capablanca} e5 {This is Black's second move!} 2. Nf3 Nc6 3. Bb5 Nf6 *

This is a sample PGN game. You'll just need { and } to enclose your comments. But you should use a chess program to do it for you. SCID is free and can do it for you. 

user12: Yes, there are two ways to add a text comment to a pgn file.
The first is far more common: simply wrap the comment in {braces}  
1. e4 {Best by test!} e5

The second is less common, but also a part of the official pgn spec1.  An end of line comment is allowed if it is preceded by a semicolon  
1. e4; Best by test!
1... e5

This is far more awkward to read (since there is an extra move number in the file) and not all software supports this.  
As an aside, all major annotating software (chessbase, chess.com, lichess.org, SCID) defaults to using the first scheme.  
1: The pgn spec file can be found either at https://www.chessclub.com/user/help/PGN-spec or http://www.saremba.de/chessgml/standards/pgn/pgn-complete.htm

11410: <p>I have a pgn file containing a game. I want to add a comment into the game (like at move 23. - This is a ok move etc.) using words and not symbols. Is it possible  to do this?</p>
 825: <pre><code>[Date "1910.01.07"]
[Result "1/2-1/2"]
[White "Carl Schlechter"]
[Black "Emanuel Lasker"]

1. e4 {Notes by J. R. Capablanca} e5 {This is Black's second move!} 2. Nf3 Nc6 3. Bb5 Nf6 *
</code></pre>

<p>This is a sample PGN game. You'll just need <code>{</code> and <code>}</code> to enclose your comments. But you should use a chess program to do it for you. SCID is free and can do it for you. </p>
 12: <p>Yes, there are two ways to add a text comment to a pgn file.</p>

<p>The first is far more common: simply wrap the comment in {braces}  </p>

<pre><code>1. e4 {Best by test!} e5
</code></pre>

<p>The second is less common, but also a part of the official pgn spec<sup>1</sup>.  An end of line comment is allowed if it is preceded by a semicolon  </p>

<pre><code>1. e4; Best by test!
1... e5
</code></pre>

<p>This is far more awkward to read (since there is an extra move number in the file) and not all software supports this.  </p>

<p>As an aside, all major annotating software (chessbase, chess.com, lichess.org, SCID) defaults to using the first scheme.  </p>

<p>1: The pgn spec file can be found either at <a href="https://www.chessclub.com/user/help/PGN-spec" rel="noreferrer">https://www.chessclub.com/user/help/PGN-spec</a> or <a href="http://www.saremba.de/chessgml/standards/pgn/pgn-complete.htm" rel="noreferrer">http://www.saremba.de/chessgml/standards/pgn/pgn-complete.htm</a></p>
