Add web parts

Add web parts to your page and share ideas through text, video, images, and more.

Add columns to a page

Select Edit section.
Choose a column layout.

Add additional web parts

Move your pointer to where you want another web part to appear, and select the plus sign.
Select the double-headed arrow to expand the tool box and see more options like Bing maps, File Viewer, and Office 365 video.
To find a specific web part, type it into Search.

Source: Microsoft