Google hacking is the term used when a hacker tries to find exploitable targets and sensitive data by using search engines. The Google Hacking Database (GHDB) is a database of queries that identify sensitive data. Although Google blocks some of the better known Google hacking queries, nothing stops a hacker from crawling any site and launching the Google Hacking Database queries directly onto the crawled content.
Update:- To learn google hacking you can download
Google Hacking for Penetration Testers book fromHere
Web Vulnerability Scanners:
A vulnerability scanner is a computer program designed to assess computers, computer systems, networks or applications for weaknesses. There are a number of types of vulnerability scanners available today, distinguished from one another by a focus on particular targets. While functionality varies between different types of vulnerability scanners, they share a common, core purpose of enumerating the vulnerabilities present in one or more targets. Vulnerability scanners are a core technology component of vulnerability management.
Update :-To Download Acunetix web vulnerability scannerclick here
I hope you like this post. For further doubts and clarifications please pass your comments.