What does PLLC stand for?

Professional Limited Liability Company.

Like a Limited Liability Company, a PLLCs must indicate this status on their business names because it affects the rights of its customers. Because a company has "limited" liability, basically, you cannot sue its officers in their personal capacity and seize their personal assets. Your recovery is limited to the assets of the business entity, generally speaking.

Hello,
I've submitted a few nice designs. Please let me know if they are close to the style you are going for.
Regards,
Lisa