Moss often grows on cement floors which can cause slippery floors so this is very dangerous because it can make people slip when walking, besides the presence of moss also gives the impression of being less clean when viewed by the eye.

This video contains How to Make a Moss Cleaning Solution/liquid, maybe a moss cleaning liquid that is sold in the market but the price is decent, so it's a good idea to make your own moss cleaning fluid which costs more economically than liquids on the market.
Want to know how???
watch this video to the end.