Welcome everyone :
In order to create this plugin I did follow these steps :
1- I have installed .zip file wordpress project.
2- I have extracted this one in a folder which I named it plugin in the htdocs folder in xampp directory.
3- I have linked it with a database in phpMyAdmin plugin.
4- Also I have created an admin for this project.
5- "Signal" is a WordPress extension that allows website administrators to collect feedback from users on the site's content, features, and user experience. Users can send signals which are recorded in a database with details such as the user's name, email address, date and time of the signal, and the content of the feedback.
6- The extensions were activated by pressing the "Activate" button.