Question on Conversions and Clicks tracking..... Please Help

I have a website showing smart watches and clicking on the buy button redirects you to the product on Amazon. I am running ads on Google & Bing.

Now, I want to track the Button clicks in Analytics and Conversions in Adwords and Bing. (somebody that comes from an Ad(Google/Bing) and presses a link that goes out (usually Amazon links))/.............

What should I do for this?


Please share your thoughts.