After you configure the basic widget settings, copy the code at the bottom of the widget and paste it into the HTML code where you want it to display on the page, or in a custom text module or widget.
In WordPress go to Appearance > Widgets and add a text widget to a widget area.
In Joomla go to Extensions > Module Manager > Custom and paste the Twitter code into the Custom Module. Assign the module to a template position, make sure it’s published, and click Save. Note: If you’re using Joomla, make sure you have turned off Text Filtering so the editor does not strip out scripts and non-html content. Also, remember to paste the code into HTML view.