As quickly, much, soon, etc. as possible
Definition 1 of 1
Pro Tip 1/3Urgency
The phrase expresses a need to act immediately, without delay. 
Please reply as soon as possible; the matter is urgent.
Pro Tip 2/3Intensity
Used to emphasize the extreme degree of an action or condition. 
He ran as quickly as possible to catch the bus.
Pro Tip 3/3Flexibility
The phrase can apply to various situations, showing adaptability in language use. 
Study the material as thoroughly as possible before the exam.