Sorry to double post, but 2 separate topics.

Can anyone tell me what this means? Specifically "Guidance."

Spirit Airlines dips after guidance rattle investors - Spirit Airlines (NASDAQ:SAVE) | Seeking Alpha

The text in question:

Spirit Airlines Dips After Guidance Rattle Investors

Feb. 7, 2017 1:50 PM ET|About: Spirit Airlines (SAVE)|By: Clark Schultz, SA News Editor

Spirit Airlines (SAVE -2.9%) trades lower after topping Q4 estimates as investors focus on the company's guidance.