Hola,
Como dice kavalerian, cada uno con lo que más le convenga
![apachar ojo](http://static.forosdelweb.com/fdwtheme/images/smilies/wink.png)
. Yo suelo poner estas:
<META HTTP-EQUIV="LANGUAGE" CONTENT="es">
<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=iso-8859-1">
<META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE">
<META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE,NO-STORE,MUST-REVALIDATE">
<META name="TITLE" CONTENT="XXXXXX">
<META NAME="DESCRIPTION" CONTENT="xxxxx">
<META NAME="KEYWORDS" CONTENT="xxxxxx">
<META NAME="REVISIT-AFTER" CONTENT="7 DAYS">
<META NAME="GOOGLEBOT" CONTENT="INDEX,FOLLOW">
<META NAME="ROBOTS" CONTENT="INDEX,FOLLOW,ALL,NO-ARCHIVE">
<META NAME="AUTHOR" CONTENT="xxxxxx">
<META NAME="SUBJECT" CONTENT="xxxxxxx">
<META NAME="COVERAGE" CONTENT="xxxxxxx">
<META NAME="OWNER" CONTENT="xxxxxxx">
<META NAME="RATING" CONTENT="xxxxxxx">
<META NAME="DISTRIBUTION" CONTENT="xxxxxxx">