HP 15.6" Touchscreen Intel Core i7 Laptop

The title says 15.6" but the description says Screen Size of 17.3". Which is it?

It’s 15.6". That 17.3" was left over from a sale when we had multiple screen sizes. It’s removed now. Sorry for the confusion.

just bought one of these does this machine play Blu-Ray DVD’s?

No, it does not play Blu-ray.

Optical Drive: SuperMulti DVD burner