Why FFT is used in signal processing?

Related questions

1. What does signal processing do?
2. How does a FFT work?
3. What is difference between DFT and FFT?
4. What is FFT in LTE?
5. Why we use Fourier series and Fourier transform?
6. What does mean failure to thrive?
7. What does failure to thrive mean in adults?
8. What is ifft in DSP?
9. What is FFT test?
10. Why DFT is needed?

Tags

1. #correlation
2. #simply
3. #transform
4. #involved
5. #computations
6. #fourier
7. #characterize
8. #phase
9. #perform
10. #combination
11. #operations
12. #algorithm
13. #discrete
14. #other
15. #compute
16. #signal
17. #convolution
18. #magnitude