What are sales and marketing decisions can point of sale help to make?

The reporting you receive from a properly set up point of sale system can be invaluable for your sales and marketing decisions.

Lets say your business is a restaurant. At any point of time, you're able to see which menu items sell and which don't. You can use this data to determine if you want to push a certian item. That's just one example of many.

Now for marketing, a point of sale system can store your customers name, email, their buying history, etc. Say you ran a report on customers who haven't made a purchase in the last 3 months. Now you have a list of customers that you can target with a marketing campaign to get them back into the store for repeat business.