They are on Twitter because they have a view to share about things they care about. And they want to know what others think and do about things they care about.
They’re on Facebook because it connects them to friends – current and long-lost ones. Because it keeps them entertained and gives them the chance to spread the happiness, the laughter, the sadness that they feel.
They’re on YouTube because they want entertainment on demand. Because they want to learn new things. Because they want to share what they created.
What are you doing there? If you’re a brand owner, it is the easiest thing to set up your own account, pick up a megaphone and start shouting what you want to say. It is a little more difficult to find out why your target customers are there in the first place. Find that out, and then let your brand fulfill their purpose, not yours.
The first method will push people away; they will close their ears to your megaphone. The second will win you friends and mentors – people willing to talk to you and listen to you.
Eventually they’ll buy from you too. No hurry.