In the startup I worked at in college, one of the most visible jobs our CEO did was talking with investors to get the next round of funding. He was also the top

In the startup I worked at in college, one of the most visible jobs our CEO did was talking with investors to get the next round of funding. He was also the top-level business strategy guy (for an example in a more mature company, look at the difference Nadella made to Microsoft's strategy relative to Ballmer), although implementation details were delegated to other roles (that he was responsible for hiring).