How to redirect my URL?
 

Can anybody know the tag for redirect the URL?

Next to the account you want to use, click Manage.
From the Settings menu, select URL Redirects.
Click the New Redirect button.
Enter the domain from your account you want to redirect. ...
Select whether or not you want all instances of your site with or without www.

where do i do these steps?

301 & 302 is the best redirect tags but both are for different condition. One is for temporary and other is for permanent.

301 redirect is just temporary, while 302 is permanent

Every one use the 301 redirect tag for the website because it is a temporary in future they want to change means it will helpful.

Use 301 direct code

301 redirection is permanent redirection use 310 redirection.

Just simply redirect from 301 redirect