Micro jobs simply means small jobs (or tasks) which takes few seconds or few minutes to complete. There are dozens of sites like mTurk, MicroWorkers which provide online micro jobs. You can earn Rs. 5 to Rs. 100 for completing a task (depending on the length of the tasks).
There are hundreds of small tasks like sharing a page, giving review or rating for a product or page, writing a short article, searching something from Google, creating a testimonial or many other simple & easy tasks.
Although one of the biggest site mTurk is not taking signup at present but you can signup with other sites and earn some decent money.
If you work 2 hours daily on these sites then you can earn minimum Rs. 8000-Rs.10,000 per month from this internet job.
Signup here for Micro Jobs & all other online jobs. Absolutely FREE.