DBA Versus Assumed Names

I’m expanding my core business and wanted to add an Assumed Name or DBA. I’m currently operating as an LLC in Illinois and wanted to add another name to help identify my work. Can someone help me understand why I would want one or the other. I’m assuming they both offer legal protection under my current LLC. Thanks for your help!

My understanding is that an ‘assumed name’ is just another way of referring to a DBA but that may not be the case. A DBA doesn’t effect your legal situation at all, it’s just a way of using a different name to represent an entity such as a person, a corp, an LLC, etc. Nothing changes, it just allows the DBA holder to do business using the desired name.