Should I track the same keywords for multiple cities that are right next to each other (there's about 10 cities in a 30 mile radius that the business services)? Or if the website ranks for a keyword in one city, will it automatically rank the same way in the city right next to it?

What about in the case where putting the MPN (manufacturer part number) might be advantageous? Would you have the main product page, and use many MPN's in the Title, or H1 tags, or product name?

Lots of people, when searching, use "Manufacturer MPN" as their search when they're in buying mode. I could see how having separate pages for each would be useful in this case, increasing conversions & rankings because of the MPN-specific content.

Love to hear your thoughts.