Getting my feet wet with mobile and cluttering the forums with too many threads, I'll keep my posts organized here!
Resources I've followed to get here over the past week:
| Banner | Impressions | Clicks | CTR |
| Ad1 | 4702 | 41 | 0.87% |
| Ad2 | 21503 | 107 | 0.50% |
| Ad3 | 22725 | 120 | 0.53% |
| Ad4 | 4666 | 72 | 1.54% |
| Ad5 | 4654 | 34 | 0.73% |
| Banner | Impressions | Clicks | CTR |
| Ad4 | 2751 | 21 | 0.76% |
| Ad2 | 3849 | 16 | 0.42% |
| Ad1 | 1075 | 8 | 0.74% |
If you are targeting many placements, you cannot cut ads by caurmen's guide. You even commented in the thread where he mentioned it
http://stmforum.com/forum/showthread...l-Significance
There are a range of approaches to placement cutting. IMO, I'd recommend cutting them on ROI as per Section 10 of the guide (before you cut any ads unless the ads are doing stunningly badly).
Multiple-placement campaigns are more statistically complicated in general, because you've got two unknown components - ad quality and placement quality. Generally I'd currently recommend narrowing down placement quality first.
I know there's another guide needed for this - will be on it soon!
Got it, I have ~400 clicks to my LP so far and see that these two placements are getting the 47% of the traffic. I will pause these placements to send traffic to the other 17 sites:
| Placement | Network | Clicks | LP CTR | CVR |
| 2 | NetworkA | 57 | 40.35% | 0.00% |
| 2 | NetworkB | 50 | 36.00% | 0.00% |
| 17 | NetworkA | 49 | 8.16% | 0.00% |
| 17 | NetworkB | 36 | 2.78% | 0.00% |
Nice detailed stats. I approach mobile a little different to most here however if i was testing your offer on a network like incrowdads/decisive i'd target the most popular 3 (or so) sites and top 3 (or so) handsets only, to eliminate the expenses needed to get statistical significance on promoting an offer with such a high cpi. Just my 2c 
Just re-read your post and noted the payout of your offer - ouch. That's pretty high for mobile: as mykeyfocus says, you're going to need a fairly large budget!
What does 54 clicks translate to in terms of how much you've spent to get them?
Update on the PIN Submit
Here's my latest stats, no conversions yet. Pretty sure it's my ads and landing page.es
I see from the payout I'll need a larger budget for this. But what's a good estimate of what kind of budget I'll need?
3x offer payout per ad times 10 ads times number of placements? So $27*10*20 = $5400....is that correct?
| Campaign | Impressions | Ad Clicks | CTR | Costs | LP CTR | LP Clicks | DL Clicks |
| C7_MOS-ES_CAR_APP | 178032 | 1330 | 0.75% | $65.87 | 14.85% | 113 | 313 |
| C6_MOS-ES_CAR_WEB | 24422 | 139 | 0.57% | $9.04 | 2.41% | 83 | 37 |
If you are getting your feet wet in mobile, my recommendation is.... PICK ANOTHER COUNTRY!
Spain is an expensive country to target and at that CPA, you're gonna require a larger budget to test. If I were you, I would pick a lower payout (say $3 and below) offer and test it first. At least you are able to obtain data faster and optimize faster. That's the key to a winning campaign. Once you start to see green, you can build up your cash flow to test new offers, and build up your confidence level too when testing new things.
Imagine if you lose spent few hundred and make 1-2 conversions on this campaign, would you say "Argh mobile is not for me, it's so tough!".
Picking the right campaign when you are starting out is just like someone going for a singing audition. Pick the wrong song and you are gone.
Keep us posted on your result!
Yep what kok said! Start low and easy. CPI is the way to go man. Spain is one of the toughest for sure, especially with the high payout you are working with. You should also be aiming for a 1% + CTR for your ads if you are running on 320x50 banner placements.
Alright, I hear ya! I had the gambler's mentality and threw up a single lander with a couple of ads hoping for easy conversions. I'm not testing enough Landing pages on the PIN submit to say I'm giving it a real shot.
So...here are stats from the CPI offer I launched in a less competitive country. I'm running 6 ads and have this split tested as follows:
| Pub/Site | Visitors | Conversions | Cost | ROI | Decision | Reason |
| 248 | 173 | 0 | $22.49 | -100.00% | CUT | Wow, $22 spend with no conversions. I need to watch my stats closerÂ… |
| 321 | 36 | 1 | $4.68 | -93.16% | Keep | Since I'm new to mobile, and I want to see a couple of the other pubs get to above 30 clicks and running the split test calculator to decide (or wait, do I run the ROI calculator?) |
| 240 | 25 | 1 | $3.25 | -90.15% | Keep | Waiting for 30+ clicks |
| 237 | 25 | 0 | $3.25 | -100.00% | Keep | Waiting for 30+ clicks |
| 315 | 20 | 0 | $2.60 | -100.00% | Keep | Waiting for 30+ clicks |
| 317 | 18 | 1 | $2.34 | -86.32% | Keep | Waiting for 30+ clicks |
| 277 | 14 | 0 | $1.82 | -100.00% | Keep | Waiting for 30+ clicks |
| 325 | 13 | 2 | $1.69 | -63.31% | Keep | Waiting for 30+ clicks |
| 287 | 11 | 0 | $1.43 | -100.00% | Keep | Waiting for 30+ clicks |
| 281 | 8 | 0 | $1.04 | -100.00% | Keep | Waiting for 30+ clicks |
| Ad | Impressions | Clicks | CTR |
| A6 | 3,814 | 6 | 0.16% |
| A7 | 3,705 | 7 | 0.19% |
| A5 | 3,793 | 14 | 0.37% |
| A4 | 16,491 | 69 | 0.42% |
| A3 | 16,079 | 74 | 0.46% |
| A1 | 54,214 | 264 | 0.49% |
What's the payout on your new offer? That'll be critical to the statistical significance levels you need.
(Or at least, to calculating expected ROI, from which you can then obtain statistical significance.)
The payout on the new offer is 0.31, and I upped my bid to 0.37.
My biggest question is whether I'm doing this calculation correctly...I'll walk through my thought process for those following along
ROI Calculator for CPC
I'm changing the ROI calculator from caurmen's Tutorial #10 to do a CPC calculation instead of impressions.
My ads are currently getting 0.5% CTR, and I think it's enlightening to see how the Minimum Viable Conversion Rate drops proportionally to CTR changes -- I should make better converting ads!
| CPM | CTR | CPC | Payout | MinROI% | MVCR% |
| 0.37 | 0.50% | 0.074 | 0.31 | 30 | 31.0% |
| 0.37 | 1.00% | 0.037 | 0.31 | 30 | 15.5% |
| Pub / Site | Visitors | Conversions | Cost | ROI | Conf Level | UpperCR% | Decision with 0.5% CTR | Decision with 1% CTR |
| 248 | 173 | 0 | $15.57 | -100.00% | 95% | 2.1% | CUT | CUT |
| 321 | 40 | 1 | $3.60 | -91.11% | 95% | 13.2% | CUT | CUT |
| 240 | 34 | 1 | $3.06 | -89.54% | 95% | 15.3% | CUT | CUT |
| 315 | 34 | 0 | $3.06 | -100.00% | 95% | 10.3% | CUT | CUT |
| 237 | 33 | 0 | $2.97 | -100.00% | 95% | 10.6% | CUT | CUT |
| 317 | 19 | 1 | $1.71 | -81.29% | 95% | 26.0% | CUT | KEEP |
| 287 | 19 | 0 | $1.71 | -100.00% | 95% | 17.6% | CUT | KEEP |
| 277 | 18 | 0 | $1.62 | -100.00% | 95% | 18.5% | CUT | KEEP |
| 325 | 17 | 2 | $1.53 | -59.48% | 95% | 36.4% | KEEP | KEEP |
| 281 | 13 | 0 | $1.17 | -100.00% | 95% | 24.7% | CUT | KEEP |
I finished a bidding test by pushing my bid to $5 and seeing what kind of impressions and the results are interesting: not much difference between my $0.37 bid and my $5.00 bid
| CPM | Time (min) | Impressions | Calc. Impressions per Hour |
| 0.37 | 15 | 570 | 2280 |
| 5.00 | 40 | 1057 | 1586 |
All looks very solid - well done!
It's this kind of hard work - whether carefully checking your stats or grinding out new ads - that lets you succeed in AM.
This is a great thread. About time someone went through the grind properly and talked actual numbers. Inspiring!