The first step is to see if you have an existing listing. There are a couple of ways to do this, however, working directly with Google is your best bet.
Visit https://www.google.com/business/ and sign in or create a new Google Business Account.
Type in your Business Name & do a search
If Google HAS your business listed, it will appear in the dropdown list
Select the business, and you will then be prompted to Verify the Business ownership
Verification options are by the phone number or by mail, per your existing listing information
Once you have verified your ownership with Google, you can edit your listing (business category, business location, business description, business hours, website address, add photo’s, etc).
IF Google does NOT have your business listed, you can request to have it added.
Click the “Add this business to Google” Link after you have completed the search.
Complete the information that is requested, and click “Finish”
You will be requested to verify ownership of the business.
Once the verification process is complete, you will be able to add or edit business information
Additional Information is available at https://support.google.com/business/answer/2911778?hl=en
After you have claimed and verified your Google My Business Listing, make sure you have Claimed and Updated your Free Listing on Ourcupboard as well!