Care of wooden boards is very simple and more about what you should not do.
Never leave a wooden board soaking in water.
Never put a wooden board in a dishwasher.
After use wipe down with a damp cloth, detergent may be used but should be rinsed off straight away. The boards should be rubbed dry and then left to air dry.
If the board becomes dried out it may be re-oiled with any proprietary cutting board oil.