What is Data masking ? how it is useful for businesses

Data masking effectively provides a solution to five key issues surrounding data – data breach, data loss, data hijacking, insecure data interface, and unauthorized data use by insiders in an organization.
It reduces risks involved in data usage in a cloud environment.
For more : wikipedia.com/data_masking

There is no valid excuse for being a private firm w/o investing consistently in data encryption software. Just know that hackers are literally waiting 'round the corner to do you dirty. Although this goes for everyone, this is more than applicable if you are a revenue-generating entity.