Not just your company’s customers.
Who are you doing the job for? It’s most likely your boss and your boss’s boss.
Probably also anyone who reports directly to you.
And definitely anyone who is affected by the reports, presentations, and decisions you make.
They all depend on you to do your job well so they can do their jobs well.
Understanding what their goals are, both in work and in life, and making it easier for them to achieve those goals will make your work relationships with them much better.
It’s also a pretty good way to be a team player.