There are dozens of ways how we can get in touch ,whether it is phone, email, any of existing messengers, casual meeting or conference. No matter how it happened, but as a result we are getting the general description of your idea. After that we have to appoint our next meeting (and means of communication) for further discussion of the project. It would be very helpful to prepare the following materials on your part:
In Magento 1.X you needed to expand export/import using special extensions. In Magento 2.0 there is a possibility to import custom options from the box.
To start, we can create a custom option for the product and save the product.
After that we can import the custom option created for any other product.
Select any product and enter the Custom options section, then select import custom options.
You will see the list of products from which you can import custom options.
Select the necessary product and import it.