Correlation between frequency and initial phase estimates using FFT

1. What is the result of FFT?
2. What does phase of FFT mean?

What is the result of FFT?

The FFT function returns a result equal to the complex, discrete Fourier transform of Array. The result of this function is a single- or double-precision complex array.

What does phase of FFT mean?

The output of the FFT is a complex vector containing information about the frequency content of the signal. The magnitude tells you the strength of the frequency components relative to other components. The phase tells you how all the frequency components align in time.