I used a white floor paint, whether you keep redoing it depends on how bothered you are about scuffs, which I'm not 😂
I just pretend it's supposed to look like that 😂
I hoover it then mop it with Flash or something similar in a bucket.
Some things have stained it in places, but obviously a white floor in a kitchen is liable to get stained.
Sometimes I put rugs down if I want a change.
You need to make sure the floorboards don't have gaps where water could get in and rot them.
In the kitchen I originally had a concrete floor, so tongue and groove was put over it (so no gaps between the boards, though it looks like floorboards) but my bathroom has actual floorboards which were painted white.
I know people who have just used ordinary paint rather than floor paint, but I imagine it's not so hard-wearing.
You could ask advice in a paint shop.