Crowdfunding can be an excellent way to raise money for a worthy cause - be it money to take your business to the next level, money to develop that brilliant idea into a viable commercial concern, or money to enable someone to receive life-saving medical care.
There are many crowdfunding sites, some specialising in equity funding, where entrepreneurs offer shares in a new business to investors looking for the next big thing. Other sites are open to anyone who wants to run a fund-raising campaign, either for business purposes, or to finance life-saving medical treatment for someone.
Essentially, these sites are there to raise money by attracting people who wouldn't normally have heard of a business idea, or the need for a child to travel abroad for specialised surgery, for instance. The principle is that lots of relatively small donations or investments accumulate to provide you with the total you need, but of course it's not as easy as posting an appeal and sitting back while the money rolls in.
The first thing to remember is that the site concerned isn't there because its owners love helping people - they are in business to make money, and they'll charge you a commission on every donation you receive. It's not huge - typically around 5%, but it's worth knowing about before you start.
Secondly, you have to convince potential backers that you aren't just trying to get the money for that holiday of a lifetime you are planning. People aren't going to part with money unless they are convinced (by you) that your appeal is for a worthy cause. If you are raising money for a business venture you need to show that you have done your homework, and you'll have to offer a suitable reward - typically shares in the business.
It has become a very big market area, and there will be thousands of other appeals like yours - you need to stand out from the crowd if you are to stand a chance of success. Getting a newspaper to publicise your worthy cause is helpful, and many appeals for money for medical expenses have succeeded in this way.