Discuss the Colebrook equation, its context $($why and when is it used$),$ the meanings of the terms

in the formula and how is it solved.

$\frac{1}{\sqrt[\phantom{2}]{f}}=-2\mathrm{.}0log(\frac{\frac{}{D}}{3\mathrm{.}7}+\frac{2\mathrm{.}51}{Re\sqrt[\phantom{2}]{f}})$