Here we discussing about a web mapping service developed and owned by Google.
It offers satellite imagery, street maps, real time traffic condition and planning of root for travelling by foot, car, bicycle.
It was first launched in february, 2005. It also offers crowdsource contribution under local guide program to add photos, videos, checking facts, uncover missing place, answering simple questions, writing reviews about a place.
It also give some special offers, discount, coupon as rewards.
I am also working as a local guide for seven month and get a coupon for redbus.com for puchasing ticket with a discount of 200. I really love to work as a local guide and helping people for knowing things about a place.Google also appreciate our efforts by giving such things.
Thank you.