Copyright
Copyrighting laws protect creative work, like design work in architecture, machinery, fashion, and apps. It can also include written work published in books, articles, magazines, and online. For small businesses with a small staff, copyright infringement can be very easy, particularly in marketing materials. For example, you cannot simply use any stock image you find online safely– many images are protected by copyright.
You also want to ensure you’ve copyrighted any of your own original words and design work, so your work isn’t used by others for their profit unfairly.