LLCs have fewer ongoing requirements compared to their corporation counterparts. For example, an LLC is not required to keep minutes or hold annual meetings. An LLC also does not have a board of directors, and isn't is held to the same record keeping standards of a corporation. Keep in mind that the state of incorporation in will have its own set of annual requirements. That includes filing the required business licenses and permits, which vary from state to state. Be sure to check in with your Secretary of State to ensure you don't accidentally miss any required filings.
PLLC, Professional Limited Liability Company: some states do not allow certain professionals to form an LLC that would limit the liability that results from the services professionals provide such as doctors, medical care; lawyers, legal advice; and accountants, accounting services; architects, architectural services; when the company formed offers the services of the professionals. Instead those states allow a PLLC or in the LLC statutes, the liability limitation only applies to the business side, such as creditors of the company, as opposed to the client/customer service side, the level of medical care, legal services, or accounting provided to clients. This is meant to maintain the higher ethical standards that these professionals have committed themselves to by becoming licensed in their profession and to prevent them from being immune (or at least limit their immunity) to malpractice suits.