Distribute tension across many layers. A big part of the procedure is the tension placed on the muscle layer. The muscle layer does not scar on the outside, and the lift obtained from that will not contribute to scarring during a facelift.
When pulling skin, the place of tension — even if much more minimal than in the more important muscle layer — is placed in a hidden location. During a minilift procedure, these locations are the hairline and behind the ear, both of which hide scars very well.