Normally we show only the product title with the Title attribute. When we include product variations we would end up with duplicate titles. To avoid that and give the channel more info about the product we will combine source fields to add the variation to the title.
Combine source fields title and attribute
Select Combine source fields and choose Product title and combine it with the attribute source fields from you attributes. In the example above we have only one attribute combined but you should add all relevant attributes your products have.