A Limited Liability Company (LLC) is a hybrid business entity having certain characteristics of both a corporation and a partnership or sole proprietorship (depending on how many owners there are).An LLC, although a business entity, is a type of unincorporated association and is not a corporation.he primary characteristic an LLC shares with a corporation is limited liability, and the primary characteristic it shares with a partnership is the availability of pass-through income taxation. It is often more flexible than a corporation, and it is well-suited for companies with a single owner.