Example: Color
1. Go to Products > Attributes > fill in name (will shown on the product, example: color) > select type (product variable type, example: color) > click “add attribute”
2. Go to Configure terms (attribute that you added) > add new name (example: red, white and etc) > click “add new”
3. Go to Products > select a product you want to add variable > edit > Product data change to variable product
4. Go to Attributes that under Product data > custom product attribute select attributes that you added before (example: color) > click “add” > tick Used for variations > value(s): select attributes (example: red, etc) > click “save attributes”
5. Go to Variations that under Attributes > select add variation > click “Go” > select color (example: red) > click arrow sign at the right side to edit information > click “Save changes”
6. Save/Publish before you close