When viewing marketplace listings you will notice that not all listings are the same types. You can hover over any listing type to get more information or reference this help page at any time.
Listing Type Abbreviations:
BUY - A member interested in buying practices.
SELL - A member interested in selling practices.
MERGE - A member interested in merging practices.
SUCC - A member looking for a successor.
CONT - A member looking for continuity.
JOIN - A member looking to join a practice or become a successor.
Marketplace search as well as the opportunity filters interface reference these abbreviations.