It is not a page layout language. Don't look for commands dealing with mathematics typesetting, margins, centering, or any of that sort of thing. Don't include a lot of meaningless links. Setting up your links relative to the current documents helps us out when we need to move whole subtrees of the filespace or when a machine name changes. Don't line things up with spaces.
Tags are all case-insensitive.
These are tags used by browsers and indexing software to take care of administrative stuff. The META tags consist of a name and a value. You'll need to put in your own description and comma-delimited list of keywords. The Headers Most Web browsers support at leats four levels of headers. Used for tables and such.