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Adsense: Contextual Advertising Advice And Tips
Adsense Is One Of The Critical Reasons To Improve SEO On Any Income Producing Web Site.

Joint Ventures And Multiple Publisher Pages

Google has told us that:

Actually, you can put multiple publishers' ad code on the same webpage. Please keep in mind that all other policies and Terms still apply, including the maximum numbers of ad units (3), search boxes (2) or referral buttons (4) that can be placed on a single page. Every publisher is responsible for the content of any website on which his/her ad code appears.

Some publishers open separate accounts and alternate the ad code so that all parties' ads get display time on the site, or display their ads on different pages within their site, depending on what works for your site and business model.

Google considers traffic from pay-to-surf services as bad traffic. They consider the traffic and impressions to be low quality. Buying traffic is also considered bad.

http://aglococash.blogspot.com is an example of a pay-to-surf service.

Scraper sites are sites that create pages of snippets from search results.

Advertise On This Site

If you choose to, you can have a Advertise On This Site link in your Google Ad units. This allows advertisers to sign up with Google and target your site to be the recipient of their ads.

However, one shortcoming of how Google have set it up is that the site targeted in the signup page is the one that you, as an Adsense publisher, originally signed with Adsense for. It is likely that you have diversified your ads onto other sites so it may not be appropriate for the potential advertiser to sign up to put ads on that original site. Here is how you may be able to bypass that original site.

Go to MY ACCOUNT > ACCOUNT SETTINGS > Onsite Advertiser Sign-up > and leave the Site name setting blank. If this field is blank, then when a potential advertiser clicks the 'Advertise on this site' link, it displays the current domain name rather than displaying a completely irrelevant site that you signed up for Adsense with.

You can tailor the landing page that potential advertisers arrive at after clicking on the advertise on this site link. In that customized landing page, you could take the opportunity to coach them how to code Adwords effectively, as ultimately these Adwords will end up on your site and you want them to draw clicks.

To customize your landing page in your account settings go to the Onsite Advertiser Sign-up section and click 'edit.'

Adsense Earnings

I think what is hurting us is that advertisers can now specify a different amount for Content Network ad bids to Search Results pages bids for Adwords or indeed opt out of the Content Network all together. I have seen some of my clicks devalue by about 75% from 12 months ago.

This is probably in response to content network (i.e. Adsense) converting less highly than SERP ads. Blame the click fraudsters and garbage web sites for this. As Google weeds out these parasites, maybe the payment will go up again. Or perhaps competition from YPN, Microsoft, Ebay or other ad providers will force Google to reward us better. The Google slap may also be a factor in the apparent decrease in earnings where poor quality sites are being forced out by Google making them bid higher.

Sometimes you see that you have clicks but no earnings on your Adsense reports. It has been posited that this is due to:

1. clicks on PSAs (unpaid Public Service Announcements)
2. clicks on link units without clicking on the resulting ads ( It seems unlikely to me that a click on a link unit with no followup ad click would show up as a click with zero earnings. I'd have a lot more clicks with zero earnings if that were the case.
3. invalid clicks - this I can vouch for.