Installing an extension:
Download the extension to your local machine as a zip file package
From the backend of your Joomla site (administration) select Extensions -> Install
Click the Browse button and select the extension package on your local machine.
Click the Upload File & Install button..
Now go to your Plugin Manager and enable the plugins below
Rapi Twitter Embed
Button - Rapi Twitter Embed
Using the PLUGIN:
Usign this plugin is very easy. You have to Create article or Custom Html Module and put the below code on where you like to show the single tweet of your page.
This code will run the single tweet with all default value on it. If you want to customize further more and put your own value than you have to put some values withing the tags you've just used.