SEO Checklist_ A step-by-step plan for fixing SEO problems with your web site ( PDFDrive )

Most spammers leave comments
with the sole intention of getting a
backlink to their own web site.
Many of these will be low quality
sites, porn sites, or other types of
sites that you would not want to
associate with your own. These
types of sites are referred to as “bad
neighborhoods” by Google. In
addition, there is nothing to stop
someone who has left a comment
on your site (and had it approved
some time ago), from redirecting
their link to a bad neighborhood at
a later date. To be safe, make
comments on your site nofollow.
Once everything is set up properly,