I have developed a website. It is under internal testing. My website is a platform. You can ask for people to do something for you and you pay them; on the other hand, you can do something for others by spending your time and get paid.If now I go to meet an angel investor, what questions will he probably ask me?
The investor will want to know:
Who you are, why he wants to work with you and what sort of "proof" you have that you'll be a good startup exec/leader.
Market opportunity, pain point to be addressed by your product
How the product is different, better, protectable. Roadmap of development plus a demo of what you have.
Sales and marketing strategy. Many, many startup execs fail at this point so don't go with the generic "if you build it they will come" or "it's gonna be viral" bs. Your current level of traction; where you will be in a few months, a year, etc
The sorts of advisors and team that you've attracted to work with you - this can help prove that you are a real leader and that your product is hitting a real market need
$ you need to get where you are going, high level idea of how big you think the company can become
Some ideas around the structure and valuation you are seeking for the investment.
You can check out my blog post on a VC investment memo; good angels usually want to know similar or the same items: http://www.startable.com/2009/05/07/venture-capital-investment-memo/
The questions I would prepare for (take with a HUGE amount of salt, since I am neither an angel investor nor a venture capitalist myself):
All the answers so far are excellent so wanted to come at this from a different angle.
From the people I know who invest in start-up (albeit this is only 3), it is not what they ask you and therefore the answers you give that will be the most important thing. The most important thing is YOU and the way you come across. Afterall, investing your your business, they are investing in you. They want to see that you are passionate, enthusiastic but also realistic. If you don't believe in what you are doing, they won't. They want someone who is grounded and not a fantasist but also has the single-minded drive and determination that whatever the setbacks, they will fight to make their business a success.
Good luck and go get 'em!
Bench depth is important. The skillset required to prototype an online service and that required to grow an online business are very different. So who is on your team, and what successes have they had in the past? Those are crucial.
Scaling fast is key. Where will your initial users come from? Do you have a believable model about the volumes of transactions you will need to breakeven and profit over time?
Know your market. You should have the most in-depth knowledge you can manage in the time you have about every other similar service in the world. How is your service different from Amazon's Mechanical Turk, or eLance, (or Craigslist or Kijiji) for example? How do you plan to compete for userbase with someone like Amazon on the scene? If they switch to an all-hard-currency model of value exchange, is that going to kill your business?