I'm doing a bit of keyword analysis on my sites and I have a question. It seems that spreading the keywords over the page is a good idea. Its common to have dynamic page titles and meta tags but do you think its a good idea to have dynamic footer tags to place the keywords in the footer too, hence keeping the spread of keywords throughout the page? Or is this a waste of time?
Sure go ahead and start adding your keywords right away, just doing over do it Adding your targeted keywords to the end of page (last 50 words) is an important on-page ranking factor.
I've heard it also can be helpful to use the footer to link to your homepage using targeted keywords - but don't use same keywords on every page for the footer link.
Using targeted keywords at the footer is dynamic to link to your page. Notice to use the same keywords which are not good for your site at high PR