It is good practice to include lots of comments in your code so that when you or someone else comes back and looks at the code you/they will understand what it is meant to do.
A comment will be ignored by the compiler, this means that anything in between the comment tags will not become a program. (Makes any scene?)
Normally there are two ways to write comments, one is a single line, and one is a multi line comment. There names explain what they mean.
So in Java and C++, a single line comment will look like this:
// Comment Text
And a multi line comment will look like this:
/* More than one line See!*/
In python a singe line comment is done like is:
# Comment text
And a multi lined comment will go like this:
" " " this is a multi line comment which spans many lines " " "
As you can see Java and C++ have the same way of creating comments but Python has a different way just to let you know that all languages do not have the same way of commenting text.
And for a small side note here is how to write comments in HTML.
<!-- Comment text in here -->
Hope this helps, Pete