SharePoint 2010’s iFilter excludes content inside of a <div class="noindex"> tag. Note that each div nested in that one is re-evaluated for the noindex class, so nested divs may not work as you expect. The product team is considering changing this so that all nested divs are excluded.
Now, when you search the portal for “Company Name” or “Privacy” you won’t get every page in the portal showing up in your results.
Note the ability to use other css classes along with noindex, to get visual styles as well. I haven’t tested the noindex class on tags other than div.