Google AdWords has the best system for getting fast and clear feedback from your ads. You can create 2 ads to rotate evenly so they are viewed equally by your visitors. The data you gather helps determine the potential profitability of your campaign.
Top 10 benefits of split testing Google Ads
1. Fast feedback
You can set up a new Google AdWords campaign and start receiving impressions and clicks to your ads almost immediately. It will depend on the popularity of your product and how well your ad was written. By split testing 2 ads you’ll soon discover the winner.
2. Improve Click Through Rate (CTR)
The purpose of split testing is to always write a better ad then test it against the best one you have. By repeating this process you constantly improve your click through rate.
3. Save time
If you just ran one ad you wouldn’t know if it was a good one. Split testing your ads saves time because you quickly discover if your campaign will be profitable.
4. Reduce Cost Per Click (CPC)
Google rewards you for improving your ads. If the ad tightly matches your keyword and landing page you’ll get a higher CTR, more conversions and a better quality score.
5. Improve writing skills
By constantly rewriting your ads to find the one that receives the most clicks and conversions you improve your writing skills. Over time you’ll find it easier to write winning ads.
6. Helps you to think like your customer
One of the keys to writing an effective ad is to get inside the mind of your customer. Ask questions like “what pain is he feeling”, or “what frustration is he experiencing” then address that emotion in your ad.
7. Improve conversions
Conversions improve by writing better ads. With split testing you quickly discover which ad is performing the best. You then write another one to try to outperform the previous one.
8. View the effect of small changes
Here are some small changes which can greatly affect the CTR of your ad:
Capitalization
Include keywords
Order of lines
Use of synonyms
Use different display URLS
Punctuation
9. Develop a winning ad
The winning ad receives the highest CTR and conversions. Use your winning ad as a model for creating ads for other profitable campaigns.
10. Improve results over time
Sometimes you need to write many ads to find one that receives a high CTR. Study the ads of your competitors that have been running for a long time. Their ads are obviously doing well otherwise they would be wasting a lot of money. By constantly improving ad quality you’ll outperform competing ads.
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It is very important to know when you have enough data to declare a winner. To calculate statistical significance of your data, I suggest you to use AdWords Intelligence Split Tester feature (http://www.adwordsintelligence.com/features/split_tester.shtml). It is available in the free version.