Prepackaged and well documented IT setups for small business. We've things like "LegalZoom" which are contracts designed by lawyers that have instructions for adapting them to your needs. A site that keeps a set of IT "best practices" for different types of businesses, restaurant, nail salon, bookshop, coffee shop, etc. Want to provide your customers with free internet but don't want to be a source of spam, do <this>. Want to keep a backup of your critical data on tarsnap do <this>. Need to buy equipment for <x>, here is an annual review of the best equipment for that, and why.

Every business needs IT but not every business knows someone who can do it for them and they don't have a way to hire someone part time.

Pair this service with a set of vetted 'sysadmins' who will work part time to put these systems into a business and update them if needed. Uber for IT help :-)