Optimize Database Tables only neccesary if you've moved, copied or deteted entries
Optimize the categories table: Only neccesary if you have edited categories lately
Optimize the links table: Only neccesary if you have removed links lately
Optimize the temp table: Only neccesary if you have recently approveded some links but still have some pending
Optimize the category relations table: Only neccesary if you have removed category relations lately
Optimize the search terms table: Only neccesary if you have removed search terms lately
Optimize the reviews table: Only neccesary if you have removed reviews lately
Optimize the sessions table: Only neccesary if you have removed reviews lately