I just moved all my content from one domain to another.

How does Adsense already know what's on the page?

[HughMungus]

I *just* moved all the content from one domain name to another and *just* re-enabled Adsense (I disable it here so I don't accidentaly click on anything). Anyway, the ads I'm getting on the new domain name are the same ones as on the old domain name. So my question is, how does Adsense know what ads to display/how did it know the content on the new domain name is the same as on the old one. I'm on the same host but different IP's.

Just curious as to how this works.

[Clark]

They send a bot moments after someone clicks on a page and detect the content and server it up. Sometimes though they'll serve an ad just on the basis of the title page or domain name...don't know if they're just trying stuff out, have some filters on when there's a lot of paid ads available to serve or what...

[HughMungus]

They send a bot moments after someone clicks on a page and detect the content and server it up.

Yeah, I know...but the ads appeared on the first few clicks...in other words, I don't see how it had time to put up an ad on a page if I just added the code and if I'm the first person to ever see the page... I wonder if the toolbar has anything to do with it.

Hm. No big deal, just found it curious.

[mcavill]

check your stats - i bet the media bot did a quick check of the page and hence targeted ads. If you're willing to test it, you could try banning the bot and putting up a page (i wouldn't personally and there's probably something horrible in the T's & C's about trying it) and see what you get...

<added>
perhaps a safer way would be to ban the bot from a sub directory and then have a page in there and test via the adsense tester [webmasterworld.com...] - i guess it would show PSA's or something related to the domain name?
</added>

[CaryissoVery]

As I've added pages the past few days, I've noticed that for the first time relevant ads appear with the first click of the page. Apparently, the mediabot has become much more efficient recently.

[Jenstar]

I first noticed this a couple months ago. Brand new domain, brand new site, brand new content, no mediabot or googlebot at that point. Went to an interior page, and while there was a lag of about a second or two before the ads showed, they were specifically targeted to that page. In fact, it was the only page on the entire site (or any of my AdSense-running sites) that had the specific keywords to trigger the ads, so I know it was not a case of theming. And sure enough, my logs showed mediabot.

[Clark]

Hugh,

That's why I added the second part:

Sometimes though they'll serve an ad just on the basis of the title page or domain name...

[Jenstar]

In the example I used, neither keywords in the title nor the domain had anything to do with the ads shown.

[longen]

When i develop and test a new html page on my hard disk, without inserting the Adsense code until i am ready to go live, the first adverts displayed are related to the site theme.
But if in include the Adsense code while testing the page on my hard disk, when i make the page live the first ads displayed will be page specific.
The pages are definately being indexed in advance somehow. It would be difficult to do in real time, and would not be justified cost-wise merely to show a relevant ad a bit earlier.

[Marcia]

I am this very evening, even right now, putting brand new /subdirectory/ pages up on a brand new site. Within mere minutes of uploading with the code the exact ads are there for the individual pages, which are related but different products.

Longen, with this site it couldn't be in advance because they're new pages. If I were paranoid I'd think it had something to do with the toolbar, but I seriously doubt it.

Last week I moved a couple of sites to a new host - new server, shared IP to shared IP - with no loss of time whatsoever.