Or both?

For a huge website (ecommerce, directory, etc.) with many variations of the same product or service, whether by location or by brand, the effort to work individually on each one would be monumental. For that reason, we often focus on:

a) The home page, which is naturally where a fair number of links will have to go.

b) A selection of the most important interior pages (such as those cities which might yield the best ROI) with a purposeful effort to help them rank better for relevant searches.

Source/Read More: SEO-Writer