StackBlock is a free Chrome add-on developed by Nenad Palinkasevic. It falls under the category of Browsers and is specifically listed under the Add-ons & Tools subcategory.

The main purpose of StackBlock is to prevent users from copy-pasting answers from StackOverflow. This add-on aims to encourage developers to understand the code they are working with, rather than relying on copying and pasting solutions found on the internet. By discouraging this practice, StackBlock aims to improve code quality and promote a better understanding of programming concepts.

StackBlock effectively stops users from copying code snippets directly from StackOverflow and pasting them into their own projects. While there are still ways to bypass this block, the intention is to make developers think twice before taking shortcuts and encourage them to write their own code.

Overall, StackBlock serves as a reminder to developers that understanding and writing their own code leads to better comprehension and higher quality programming.