can someone explained the self employed feature?

I'm gonna use it for my sims that own businesses. It bugged me that when a sim owned a business it still showed them as unemployed so this will fit in with my Entrepreneur's. For instance I currently have a sim that own's a flower shop and garden, she is also part of the gardener career but only to show she's employed in something I just select work from home and have her complete the task in her shop. On another save I have a sim that runs a boutique cafe and another that runs a restaurant.

It will also be a nice feature for those who do street/lounge/bar/cafe... performances or just freelance.