Any pool deck can gather stains, oil spills from the grill, and slippery algae over time. However, the sort of maintenance you do depends on what kind of pool decking material is used.
If you have a concrete deck, it is effortless to maintain. You can keep it clean by pressure washing it regularly and using a sealant. If you see any peeling or cracks, repairing them immediately will go a long way in preventing significant issues.
If you have a wooden deck, you should sweep off the dirt and leaves collected on the deck frequently. In the winter, shoveling snow must be done in order to maintain your deck. You will need a professional to clean and seal the deck every 2-3 years.