Configuring Product Custom Options is the simple way to give your customers many choices for a detailed products.The input types of an option you can set are text, file, select and date. However, you can manage the custom options in stock because they are just variations of an SKU. If you want to set one option for a bulk of products in magento 2 extensions, let do it for one, and then import the custom option to other items.
Adding more product custom options means you will generate the greater revenue and serve your customers in the perfect way.
How to Configure Product Custom Options in Magento 2 as the following:
Editlink of specific product on the Product Management table.
Advanced Settings > Custom Options.
Add New Option,
Input Typefrom a dropdown list.
Requiredcheckbox if you find the option necessary.
Pricefor the option
Price Type: Fixed or Percentage.
SKUfor the option.
Sorticon to drag it to the new place.
Add New Optionif you want to add more.
Savebutton to finish.
Save & Closebutton when you finish.
Reference: Magento 2 user guide
It comes to the end of tutorial: How to Configure Product Custom Options in Magento 2.