You should read this here for some clarification on the term - https://www.investopedia.com/terms/s/seasoning.asp
It is very important to know how a particular thing works and clearing your doubts about seasoned trading would benefit you all along. You can read about it here - https://www.investopedia.com/terms/s/seasoned_security.asp
2400 baud, brings back such sweet, sweet memories. When I went to it from 300 baud, I nearly teared up... much like I'm doing right now. Long live the BBS's and the good old days!!!!!