This is one of the easiest buttercream finishes. As others have posted, rustic. So there’s no wrong or right way to do it. Just smearing the buttercream in a fashion that looks good to you. Buttercream should be medium consistency, easily spreadable, not too thin or too thick.
Creativity is God's gift to us. Using our creativity is our gift back to God. Clarky's Cakes 😎