When a startup first begins, it will often start with something called "C" funding. This is the most basic form of funding and is usually provided by friends and family. If the startup is successful with C funding, it may then look for "series A" funding. Series A funding is much more substantial than C funding and comes from professional investors who are looking to make a return on their investment. The terms of series A funding are also more favorable to the startup, meaning that the company has more control over its future.