Can I use Google Adsense for a free website or a free blog?

yes. heres info. http://signuptoadsense.blogspot.com here tells you the difference between having your own free pages and using AdSence on a 3rd party platform. http://hubpages.com/_google1/hub/Work-any-where-in-the-world-with-Google-AdSense

yes you can use it

Site Content While Google offers broad access to a variety of content in the search index, publishers in the AdSense program may only place Google ads on sites that adhere to our content guidelines, and ads must not be displayed on any page with content primarily in an unsupported language. View a list of supported languages. Sites displaying Google ads may not include: • Violent content, racial intolerance, or advocacy against any individual, group, or organization • Pornography, adult, or mature content • Hacking/cracking content • Illicit drugs and drug paraphernalia • Excessive profanity • Gambling or casino-related content • Content regarding programs which compensate users for clicking on ads or offers, performing searches, surfing websites, or reading emails • Excessive, repetitive, or irrelevant keywords in the content or code of web pages • Deceptive or manipulative content or construction to improve your site's search engine ranking, e.g., your site's PageRank • Sales or promotion of weapons or ammunition (e.g., firearms, fighting knives, stun guns) • Sales or promotion of beer or hard alcohol • Sales or promotion of tobacco or tobacco-related products • Sales or promotion of prescription drugs • Sales or promotion of products that are replicas or imitations of designer goods • Sales or distribution of term papers or student essays • Any other content that is illegal, promotes illegal activity, or infringes on the legal rights of others Copyrighted Material Website publishers may not display Google ads on web pages with content protected by copyright law unless they have the necessary legal rights to display that content. Please see our DMCA policy for more information. Webmaster Guidelines AdSense publishers are required to adhere to the webmaster quality guidelines posted at http://www.google.com/webmasters/guidelines.html. Site and Ad Behavior Sites showing Google ads should be easy for users to navigate and should not contain excessive pop-ups. AdSense code may not be altered, nor may standard ad behavior be manipulated in any way that is not explicitly permitted by Google. • Sites showing Google ads may not contain pop-ups or pop-unders that interfere with site navigation, change user preferences, or initiate downloads. • Any AdSense code must be pasted directly into webpages without modification. AdSense participants are not allowed to alter any portion of the code or change the behavior, targeting, or delivery of ads. For instance, clicks on Google ads may not result in a new browser window being launched. • A site or third party cannot display our ads, search box, search results, or referral buttons as a result of the actions of any software application such as a toolbar. • No AdSense code may be integrated into a software application. • Webpages containing AdSense code may not be loaded by any software that can trigger pop-ups, redirect users to unwanted websites, modify browser settings, or otherwise interfere with site navigation. It is your responsibility to ensure that no ad network or affiliate uses such methods to direct traffic to pages that contain your AdSense code. • Referral offerings must be made without any obligation or requirement to end users. Publishers may not solicit email addresses from users in conjunction with AdSense referral units. • Publishers using online advertising to drive traffic to pages showing Google ads must comply with the spirit of Google's Landing Page Quality Guidelines. For instance, if you advertise for sites participating in the AdSense program, the advertising should not be deceptive to users.

yes you can register.. well no problem for that... what you wanna do is register.. well approval is a sole right of google teams.. i have approved it for my website ..thats free... also if ur having or gonna great blog... in blogger.. u can directly apply.. good luck