If you have a product or service that you want to promote instantly then relying on Google or other search engines to crawl your new content and then list you high enough to get clicks in the organic search results can be a long process. Luckily Google have a program that allows you to create an advert and show it instantly. This is called Google Adwords and if set up and monitored correctly, can get you clicks through to your site the same day.
Basically, you create an ad or multiple adverts and then select a list of keywords, that when searched for, you want your ad to appear. Each time your advert is clicked on you are charged a certain amount and the visitor is then taken to the chosen page on your site.
How much you pay for each click depends on the level of competition and the quality score your keyword has. Using an experienced Google Adwords professional is highly recommend to get the best results.