Widgets are the items located on the sidebar of your site. To manage your widgets, go to the Appearance tab and select Widgets. Under available widgets, you can see all the widgets you can put on your sites. Each one is listed by name along with a basic description.
On the right side of the screen, there are various areas to place your widgets. Use your cursor to drag-and-drop widgets to the sidebar. You can organize these as you see fit. Clicking the drop-down arrow will bring up options for the widget. Depending on the widget you will have more or less options. Clicking Close will close the options without saving and Delete will delete them. Clicking Save will save the settings for this widget.
If you wish to get rid of a widget but save its current settings, drag it on to the Inactive Widgets. You can restore the widget at anytime just by dragging it back. Clicking the Screen Options at the top of the page will give you a choice to enable accessibility mode. This just offers you a way of managing your widgets. You can deactivate it at any time by going back to Screen Options and hitting Disable accessibility mode. Once you are done, click your site’s name in the admin bar to view your changes.