This is the relatively small set of keywords that your prospective customers are most likely to use when looking for your products and services.
Usually there are somewhere between 5 to 12 such words and phrases for each business service or product offering.
For example, let's look at core keywords for a plumber.
- toilet repair
- sewer cleaning
- water heater repair
- pipe repair
- plumbing repair
- plumbing service
- plumbing services
- plumbing companies
Your core keywords along with your location keywords may be all that you need.