Do you mean reach people / advertising? This video will tell you how:
You can also expand your sales channels and promote your products on Google Shopping using the AllFetch Google Shopping Feed app (it's free). It allows you to easily syncing your products from your Shopify store to the Google Merchant Center.
Creating a profitable ad strategy is one of the things we are going to help with during our free training. We are going to cover high traffic with no sales, spending on Ads with no return and visitors abandoning cart. We will help you develop a profitable ad strategy and learn how to generate free traffic, transform your Shopify store into a professional. trustworthy store that customers want to shop at and help you find winning products that people can’t wait to buy. Our free private Facebook training is happening on April 26 – 30, we will be going live every day at 1:00PM (EST). You can sign up here. Really hope you join us!
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Best of luck!
If I've misunderstood your question I apologize, please follow up and clarify.
@Humanityebooks, can you specify what reach you are asking for?