The answer to 'how to maintain patio' is to regularly clean, reseal, and make minor repairs to your patio to keep it looking its best and prevent damage. This includes sweeping away debris, pressure washing the surface, resealing the pavers or concrete every 2-3 years, and addressing any cracks or uneven areas promptly.
For concrete patios, you'll want to use a concrete cleaner and sealer designed for outdoor use. Pavers may need a specialized paver sealer. Be sure to follow the product instructions carefully. Minor cracks can be filled with a concrete patching compound, while larger issues may require professional repair.