u/Eastern-Author2210

Looking for advice. We bought about a year and a half ago. The previous owners sanded and restrained the exterior over a spans of 3 years. Our southwest wall is showing wear. What should we do???? I seen some say online that you can and should apply another layer of stain every 2 years. Would that be just putting another layer on or should we sand? Also I seen things about clear coats. Any advice is welcomed and appreciated!