PR = Pagerank PageRank is what Google uses to determine the importance of a web page. It's one of many factors used to determine which pages appear in search results. Hope this helps
API stands for "Application Program Interface" An API is a set of commands, functions, and protocols which programmers can use when building software for a specific operating system. BTW Google is your friend
PR 7 is better than PR5. To reach the PR7, you need a lot of high quality backlinks in more than 6 months.
The question is not regarding money.. PR5 too can get you lot of money. Question is how PR7 is stronger?
comment was a joke as you can see from the smile. answer to the question is addressed above so a joke could not hurt. we all are in the same game here so why not have some fun
PR 5 and PR 7 means you are doing a good job in promoting your site! Its already established site. It gain a points to google thats why you have PR 5 and PR 7.