how to make a good robots.txt file

hello friends

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User-agent: *
Disallow: *.js
Disallow: search.php
Disallow: /includes/
Disallow: /install/
Disallow: /customavatars/

Maybe someone of you explain to me why in this tutorial to create a robots.txt
is

Is such a manner without the slash of Use is correct?


Please explain why the tutorial was used with vBSEO Disallow: without a slash for the search