The belief here is that the keywords you use in H2-H6 subheadings are more heavily weighted in Google’s algorithm than words in plain text and that tags are therefore a ranking factor of their own.

Hi guys,<BR>I'm writing a html to pdf converter in Ruby. My problem is I don't know what font size to use when I parse a heading tag such as H1 or H2, etc. I've tried searching for some specifications ...