Applying a paragraph style to text makes it easy to change several attributes of the text—like its size and color—all at once, rather than making the changes individually.
Select the text or shape with the text you want to change.
Click the Text tab at the top of the sidebar on the right.
If you don’t see a sidebar, or the sidebar doesn’t have a Text tab, click 
in the toolbar.
Click the paragraph style name at the top of the sidebar, then choose a style from the Paragraph Styles pop-up menu.
If you later change the look of text that has a paragraph style applied to it—for example, you make the text bold or change its color—an asterisk and an Update button, in some cases, appears next to the style’s name in the Paragraph Styles pop-up menu, indicating that the style has an override. You can update the paragraph style to incorporate the overrides if you want.
Note: You can also apply list styles to lists.