Third-party data is any data you receive that is not yours, whereas first-party data is collected from your proprietary sources. The third-party data information you collect is generally the same, but someone else did the work. It usually consists of buying data from another company, partnering with a business to earn a mutual benefit, and/or researching available information.
An ETL Pipeline refers to the process in computing where data is extracted (E), transformed (T), and loaded (L) into an output data container.