So apparently not everyone in the world uses this but would benefit if they did.
What does it do? So say you need a new apple keyboard, a Blu Ray box set, a monitor or a HDD. Just use Google Chrome with this extension installed and it will scour other major tech sites for better prices and coupons. Always find the cheapest.
This is what I have turned on for buying all Dan Course Ltd equipment. It looks like this on most sites,