There are a lot of different blocks that you can work with.
Image - Add an single image to the page.
Gallery - Add a set of images (Gallery) in to you page.
Media - Add media items from the Media collection into your page.
Embed - Add another website page inside of your page. This can be from another website or your own.
Form - Add an existing form or create a new form and add it into your page.
Columns - Split an editable region into multiple (up to five) columns of content.
Table - Add a table to your page.
Text Rule - Insert a horizontal line called a Text Rule to divide sections of content.
Lists - Add a numbered list (ordered) or bullet list (unordered) to your page
HTML - Add raw HTML code into your page