Use shortcodes to represent any kind of content or programming code within your contents.

The shortcode structure is like this:

[name_of_shortcode attr1="value 1" attr2="value2" ...]

Sample (contact form):

[forms slug="home-contact"]

slug: is the attribute name
home-contact: is the value for attribute slug

Note: Some Shortcodes don't need any attributes.

To see the available Shortcodes, go to: admin->settings -> shortcodes