Hootsuite is a social media management product. It intelligently uses google ads on its competitors for better awareness. For example, if someone is searching for ‘Buffer’ - another leading product in similar space , the ad shown in the image shows up.
What's interesting is the way the ad copy has been articulated. It is very contextual as the user will be interested in knowing what makes HootSuite different from Buffer.
This is definitely a good hack to increase the awareness at the right time and in the right way.