Two Column layout in the picture below on the left is the default layout of the theme. The left area of the page is where the contents/articles are printed. The area on the right is for the rightside bar widgets. On the rightside of the picture is the One-Column Layout of the theme. Where you can use to some shortcodes with One-column layout.
Two Column layout (default) and One Column layout
How to set a page to the one-column layout
1) Add new page by click add new from the left options list of WordPress
Add a new page
2) Select from template Options to One Column Layout.
Selecting one-column layout
Leave a comment
Let us know what you think!