What is a transfer fee in Texas?

Can you explain what a transfer fee is in the context of Texas? I'm curious to know how it differs from other states or even in other financial transactions. Is it a one-time charge or is it recurring? How does it factor into the overall cost of a real estate transaction or any other type of asset transfer? Additionally, are there any regulations or laws in Texas that specifically govern the calculation and collection of transfer fees? I'd appreciate a clear and concise explanation to help me better understand this financial concept.