So you're interested in all pages related to one particular subject? Wouldn't it be great if all the related pages were marked with a special tag?
Well, most of them are. And you can help out by tagging your pages as well. You must have noticed the "Tag Cloud" in the side bar. The more pages that are tagged with a certain word, the bigger the tag appears there.
Each tagged page displays its tags near the author's user-name. That way, you can easily browse all pages that are related to that one.
The tag-line is a list of links. Notice the commas in between tags. Each link will zjink you to a list of all pages that have that tag attached.
When you are writing a page (forum, robot, tip, whatever), you will almost always find a field called "Tags". Sometimes you must search under "Additional information". As you are typing out a word in the tag-box, your computer will begin to search the LMR database for similar, existing tags. Similar means: words that are spelled exactly the same. Even upper/lower case makes a difference. Notice the little wheel spinning at the end of the box. Wait for it!
The box will search and sometimes find a tag that looks a lot like the one you were planning to use. When that pre-existing word is a suitable tag for your new page, use it. Just click it in order to fill the box. Add more tags by typing a comma first and then the new word(s).
The comma in between is very important. Without commas, all the entered words would be stored as one long tag. A tag can consist of multiple words. Make sure your multi-word tag makes sense to your text.
Look at this example. It uses three tags.
The tags are: "picaxe", "picaxe x2" and "x2". Without those commas it would be one long and silly tag called "picaxe picaxe x2 x2".
I am guessing Frits wanted to make sure his forum post could be found using different (although similar sounding) tags.
Here is an example of someone forgetting his commas.
That is one, wrong, long, useless tag. It will never have a second page tagged with that exact sentence. It can be easily fixed though. The author of that page can edit it and put some commas in. The old, wrong, long, useless tag will then be ignored from that moment on.