Colour correction and colour grading are essential if you want your
video to look professional. Since your video will likely be watched on
many different devices with many different screens, chances are it will
look slightly different to everyone.
To optimise the quality of the image for everyone, you can use some of
the tools inuilt into Premiere Pro to analyse the colour in your video
and adjust them accordingly. This also avoids making incorrect decisions
that can arise from your own monitor not representing the colour
accurately.
To video
To video