Similarly, Glassdoor.com is also one of the most useful websites where you can find the information about the company and salary range they offer to their employees. Review this along with any other “basics” you should be familiar with prior to the interview, like company size, location, and history. Glassdoor.com collects and makes reviews of different employers available. Glassdoor also offers you company related interview questions and answers that specific employers seem to use..
Lastly, check out the company’s Twitter and Facebook profiles. You may be able to glean a bit about corporate culture through a company’s blog and social media accounts. Identify some of the company's chief competitors and research them in much the same way you've research the company you're interviewing with. What differences do you notice? Tell the fact to your interviewer. This helps to prove the interviewer that you are the best candidate for the position.