Wiki markup is the custom language used to create pages in a Wiki. Each Wiki tends to have its own language and Confluence is no exception. Confluence makes extensive use of Macros to provide a lot of power in very concise syntax.
Refer to the complete Confluence Notation Guide for details.
For example, the following Wiki markup for a table:
||Date||Task|| |Wednesday|Write glossary entry| |Thursday|Rest|
is shown by Confluence as:
| Date | Task |
|---|---|
| Wednesday | Write glossary entry |
| Thursday | Rest |