There are 4 special components in Selenium which are as follows:-
Selenium IDE (Integrated Development Environment)
Selenium GRID
Selenium 1.0 (Also called as Remote Control)
Selenium 2.0/3.0 (Also called as Webdriver)
In order to learn Selenium and to have a valuable certificate in it you can go with the following Selenium Training Course. If you want to learn the concept free of cost then you can watch the free video tutorial of Selenium link is down below:-
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