Step 1: Login to the Cpanel.
Step 2: Open File Manager and go to the root directory of your website.
Step 3: The Robots.txt file should be in the same location as the index file of your website.
Step 4: Right click on the phpinfo.php file and choose code editor to edit
Step 5: Add the lines of the code provided above to the file and click on ‘Save’ to save the changes made.
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