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Two Google Ads better than one?
lisagauss




msg:1327412
 5:35 am on Oct 17, 2004 (gmt 0)

Is showing two Google ads on one page better than showing one as far as revenues is concerned?

 

PhraSEOlogy




msg:1327413
 5:52 am on Oct 17, 2004 (gmt 0)

I recently added an additional adsense box directly below the existing one and did see a slight increase in revenue from those pages.

Those ads were below the fold so most people click on the ads if they havent found what they want on the page itself.

diamondgrl




msg:1327414
 5:57 am on Oct 17, 2004 (gmt 0)

I've not had luck with multiple ads so far when the second ad is close to the first on the page. The presumed reason is that the presence of a second ad causes "down-selling" from the higher-EPC ads to the lower ones.

I am still running tests to see if significant separation from the first ad block to the second ad block removes the down-selling effect. My guess is that it will but the data's not there yet.

webmastertexas




msg:1327415
 6:27 am on Oct 17, 2004 (gmt 0)

I wrapped my articles around one square ad and put a 486 banner at the bottom of the article. My CTR has gone up .2% in the 3 days since I did this, and my earnings have almost doubled. I'd say Yeah, it works. :)

shinyblue




msg:1327416
 10:44 pm on Oct 17, 2004 (gmt 0)

webmastertexas, what ad setup did you have before?

webmastertexas




msg:1327417
 11:03 pm on Oct 17, 2004 (gmt 0)

webmastertexas, what ad setup did you have before?

For the longest time I wrapped my articles around a wide skyscraper. I never surpassed .4 CTR with it.

skunker




msg:1327418
 3:59 am on Oct 18, 2004 (gmt 0)

A recent discussion about having 2 or more adsense ads concluded overall that it was NOT FAVORABLE. It seems the majority of people had less CPC with TWO ads than just having ONE ad. It seems to be true for my sites, as well.

webmastertexas




msg:1327419
 4:35 am on Oct 18, 2004 (gmt 0)

A recent discussion about having 2 or more adsense ads concluded overall that it was NOT FAVORABLE.

My earnings for the last 4 days says different. :)

skunker




msg:1327420
 3:18 pm on Oct 18, 2004 (gmt 0)

Yea, I think the first few days work well, but then after that, it drops. But please keep us informed of your progress. I am curious to know how it works out for you. Thanks.

cabowabo




msg:1327421
 4:06 pm on Oct 18, 2004 (gmt 0)

I think the issue cannot be painted with a wide brush, instead it is a site by site basis. In our testing, many sites see an increase with multiple ads, while others see a decrease. Viewership, education level, interest, if the site is commercial or not, plays in major factors.

Best advice is to perform A/B testings and go with the results.

Cheers,

CaboWabo

skunker




msg:1327422
 4:24 pm on Oct 18, 2004 (gmt 0)

I understand that, but in that recent discussion...I need to find the thread...an overwhelming majority had bad CPC. Maybe the majority of people here have almost identical sites, i don't know.

alika




msg:1327423
 4:30 pm on Oct 18, 2004 (gmt 0)

A recent discussion about having 2 or more adsense ads concluded overall that it was NOT FAVORABLE. It seems the majority of people had less CPC with TWO ads than just having ONE ad.

It is hard to form your own conclusions based on what other people post here in the forum. For one, the most vocal are almost always those who have suffered a decline. The posts are skewed towards those with unfavorable experiences.

Plus, what is CPC at the end of the day? You don't bring that to the bank. You look at the revenues. The revenues are what you cash at the bank. In our case, using multiple ads contributed to an increase in revenues.

The only thing to consider is to experiment multiple ads on your own site -- then base your conclusions on the metrics that you deem important. Not what other folks are saying.

webmastertexas




msg:1327424
 8:22 pm on Oct 18, 2004 (gmt 0)

Maybe I was being too hasty. In an effort to find out what was happening, I put the G codes in channels, and it seems that, even though I have two banners (one in the middle of the article -- the square) and another at the bottom -- the 486 banner, the vast majority of clicks come from the square banner, and the 486 banner only counted for a miniscule percentage. But the channel only showed for one day (I believe G's channel reports are two days late), so I'll have to see tomorrow if the trend continues. But from this one-day test, it seems as if my increase in earnings (doubling my previous earnings!) is coming from the square ads, and not the inclusion of a second banner on the site. Hmm. I will keep you up to date after a week.

diamondgrl




msg:1327425
 11:12 pm on Oct 18, 2004 (gmt 0)

cabowabo said it best. A/B controlled testing is the ONLY way to determine what works. Otherwise, you'll fool yourself into believing one thing or the other when you have no scientific basis for it.

Atomic




msg:1327426
 11:14 pm on Oct 18, 2004 (gmt 0)

But from this one-day test, it seems as if my increase in earnings (doubling my previous earnings!) is coming from the square ads, and not the inclusion of a second banner on the site. Hmm. I will keep you up to date after a week.

If your visitors pass up the square ad in the center of your content but click the one at the bottom once in a while why not keep the bottom one? It generates income right?

diamondgrl




msg:1327427
 11:40 pm on Oct 18, 2004 (gmt 0)

Atomic, not necessarily. It's possible that by putting a second block of ads on the page, you are "downselling", causing some people who might click on a high CPC ad to a low CPC one. And, by adding ads to the page, you may be making your page too commercial, turning off users.

On the other hand, it may be that you really don't have any downselling going on and only pick up revenue. Without a scientific test, you are just talking out your arse and fooling yourself.

Atomic




msg:1327428
 11:56 pm on Oct 18, 2004 (gmt 0)

And, by adding ads to the page, you may be making your page too commercial, turning off users.

This is my biggest concern since the ads almost universally contradict my site's content.

I do seem to be getting additional revenue after testing it over a few months. Love the money. Hate the actual ads.

cabowabo




msg:1327429
 5:49 am on Oct 21, 2004 (gmt 0)

Diamondgrl, thanks for the props ...

As for the issue at hand, if you are performing one day tests, I do hope you are testing with at least 10,000 impressions. Anything less would be "uncivilized".

Remember, your data is only as good as where you harvested it from.

Cheers,

CaboWabo

diamondgrl




msg:1327430
 6:29 am on Oct 21, 2004 (gmt 0)

Actually, 10,000 impressions would not be enough if you have a low CTR. If you have a high one, it can be more than plenty.

Generally speaking, your margin of error is 1 divided by the square root of n, where n is the number of events that you are monitoring. In this case, you are monitoring clicks, not impressions, so if, say, you get 100 clicks on 10,000 impressions, your margin of error is 10% (1 over the square root of 100, or .1). Therefore, if your test only results in a 10% difference, you really have no idea if it's statistically significant or just caused by the natural variation expected.

Only by continuing the test until you get a statistically significant sample can you determine for sure whether there is a real difference (and even then, it's not "for sure", just statistically likely, since after all, you aren't guaranteed to win the baseball pennant race in a 7-game series even if you have won the first three games).

Finally, I would add that doing the test one day at a time - one day one way and one day the other - is poor methodology. A better way is to completely randomize each ad showing, so that you have a 50% chance of running just one ad at any one point and a 50% chance of running multiple ads. Varying it by day adds an unnecessary complication, which is that there could be some effect based on day of the week (people might click more often on Monday when they get to work than on Tuesday, say).

dataguy




msg:1327431
 2:50 pm on Oct 21, 2004 (gmt 0)

diamondgirl, you need to write an ebook!

I tried multiple ad units for a week and decided that they hurt revenue. Then two weeks ago I was updating a site that had 3 specific areas of each page (very long web pages), and I used three ad units, each one in a specific way that matched the area (two are single ads, one is a skyscraper).

After 2 weeks, AdSense revenue has more than tripled. I guess it hasn't been long enough to say that the revenue will remain this way, but for now, it's all good.

cabowabo




msg:1327432
 6:01 pm on Oct 21, 2004 (gmt 0)

Diamondgrl, fantastic summary and great slam on the Yankees as well!

CW

FromRocky




msg:1327433
 2:13 am on Oct 22, 2004 (gmt 0)

I don't need to go into all that trouble. I don't have 10,000 page images nor n^2 error for my key pages.

What I did is to set up a channel for each ad unit in the key page and after three days of data, I can tell whether it works or not.

In some pages they just don't work clearly. For example:
Data show:
1. Ads show in all three channels (Top, middle and bottom for the long pages) since they have the same number of images.
2. EPC in the top channel =~6x to 10x bottom channel
3. The most CTR in top and the least in bottom
4. Overall not much change in earnings.

I removed the multi-ads since I don't want the cheap ads shown on my site.

My conclusion is that the multi-ad for a page with high or mid pay ads doesn't give any advantage over a single ad at the best location.

[edited by: FromRocky at 3:02 am (utc) on Oct. 22, 2004]

webmastertexas




msg:1327434
 2:51 am on Oct 22, 2004 (gmt 0)

Geez give it a rest with all the mathetical calclations and junk. It's just ads, not rocket science. Put them in channels and wait a week. You'll see all the results and see the patterns for good or ill. Do what's best.

SHEESH.

cabowabo




msg:1327435
 1:57 pm on Oct 22, 2004 (gmt 0)

Actually, it is rocket science and you must go beyond channels when you are working with high end sites. For example, when a .1% move in CTR can mean a difference in $35k in annual revenue, you run the numbers in detail - because you want to be on the right of the scale, not the left.

Cheers,

CaboWabo

diamondgrl




msg:1327436
 2:54 pm on Oct 22, 2004 (gmt 0)

diamondgirl, you need to write an ebook!

I would except that the book would probably have "mathetical calclations and junk" and apparently bore most readers to tears.

Freedom




msg:1327437
 3:08 pm on Oct 22, 2004 (gmt 0)

Let me just give a simple answer to the question that started the thread.

For me, multiple ad units have increased my income on those sites 1.5 - 3X.

The End.

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