Bu Meta Name lerin Siteye Faydası Nedir ?

<meta name="robots" content="index, follow" />
<meta name="robots" content="index, archive" />
<meta name="robots" content="all" />
<meta name="gigabot" content="index, archive" />
<meta name="gigabot" content="index, follow" />
<meta name="gigabot" content="all" />
<meta name="googlebot" content="index, follow" />
<meta name="googlebot" content="index, archive" />
<meta name="googlebot" content="all" />
<meta name="yahoobot" content="index, follow" />
<meta name="msnbot" content="index, follow" />
<meta name="alexabot" content="index, follow" />
<meta name="askbot" content="index, follow" />
<meta name="aolbot" content="index, follow" />
<meta name="altavistabot" content="index, follow" />
<meta name="excitebot" content="index, follow" />
<meta name="lycosbot" content="index, follow" />
<meta name="iwonbot" content="index, follow" />
<meta name="dmozbot" content="index, follow" />