First of all, you need to login Twitter: https://apps.twitter.com/
Secondly Get the zip file from https://wordpress.org/plugins/teg-twitter-api/
Installing your plugin is not a difficult task. You just need to follow following steps below.
- Install the Accordion for WordPress from the WordPress.org. Simply go to Plugins >Add New in the WordPress Dashboard.
- Search for the TEG Twitter API
- Select the TEG Twitter API plugin and install
- Activate after installation
Additionally, if you are using FTP to transfer your files to your server. Get the zip file from https://wordpress.org/plugins/teg-twitter-api/
click the download button. Then just unzip the plugin and upload directory
teg-twitter-api to your directory