Sony acknowledges this and this is why the PS4 controllers comes with a dedicated Share button. Before you can share screenshots, there's a few things to keep in mind:
With those disclaimers out of the way, here's how you can share your greatest - or worst - gaming moments with your friends by taking a screenshot on the Sony PlayStation 4:
Press the Share button on your PS4 controller for at least one second.
This will open up the share menu. Here, press the triangle button to save the screenshot.
If you want to discard the screenshot, press the circle button on the PlayStation 4 controller.
To share the screenshot, press the Share button again, choose the Upload Screenshot option.
Now you can choose which screenshot you'd like to share. Choose the screenshot you want by navigating to the image of your choice.
You will now be asked to choose which online service you would like to share it to.
Choose your service i.e. Facebook or Twitter.
Enter a comment (or not) and select Upload.
That's it, you just shared your first screenshot from the Sony PlayStation 4.