* 掃除 (sōji): This is the most common and general word for cleaning, referring to the act of cleaning something. It's suitable for most situations.
* 清掃 (seisō): This word is more formal and often used in public spaces or for professional cleaning services.
* 片付け (katazuke): This means "tidying up" or "putting things in order." While not strictly "cleaning," it often overlaps with the process.
So, the best word to use depends on what you're cleaning and the context. For most everyday situations, 掃除 (sōji) is your best bet.