# How does the AB test algorithm work, does the system send the best emails? Where to see examples of efficient tunnels, for different fields of activity.

How does the AB test algorithm work, does the system send the best emails? Where to see examples of efficient tunnels, for different fields of activity.

##### Post Metadata
- Posted at: about 5 years ago
- Author title: Consultant
- Net upvotes: 2


## Comments
### Comment 1

If you have 100 contacts under an email sequence, in this case, 50 contacts will receive A, and another 50 contacts will be received B. You need to check that out which one gives you better output. You can check that out by a filter. Then you need to select the best one for you. 

##### Comment Metadata
- Posted at: over 3 years ago
- Author title: CEO



### Comment 2

Hi Alekas, thanks for the question! 

With A/B testing you create several options of an email that are equally distributed among the contacts on your list. Thus, all variants are sent in parallel. Once they are sent, you can see how each option performs in the dashboard and choose the best one to use in the future. 
Here are useful links to learn more about this feature 
- https://reply.io/a-b-testing-outbound-campaigns and 
- https://support.reply.io/en/articles/978122-a-b-testing-in-sequences

As for the second part of your question, if you are looking for examples of sequence templates to use in Reply, please see these resources:
- https://reply.io/14-sdr-sequence-types
- https://reply.io/inbound-sequence-templates
- https://reply.io/outbound-sequence-templates

Hope this helps!

##### Comment Metadata
- Posted at: about 4 years ago




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