This post will help you configure the attributes of your campaigns in the AdWords API and ensure they're ready for the 
Search Network with Display Select (SNDS) migration.
In v201402, we introduced the 
displaySelect attribute to indicate the campaign state during the migration period. Consider 
displaySelect as a transitional flag: it only has meaning when 
advertisingChannelType is set to 
SEARCH and both search and content networks set to true in 
networkSettings.  Elsewhere, it can be safely ignored.
Starting 
September 16th 2014, we will begin 
automatically upgrading legacy 
Search & Display campaigns. Once the migration is complete, we will remove the 
displaySelect flag from the Campaign entity and service in a subsequent API release. Therefore, we recommend not setting any value for 
displaySelect in your campaign creation code, so you don’t need to maintain it later. It is only useful for migrating 
Search & Display campaigns to 
SNDS.
If you take a 
Search Only campaign that had 
contentNetwork = false in its 
networkSettings, and set that to 
true in v201402, thereby opting into the Display network, the API will also then set 
displaySelect to 
true, so that you don’t mistakenly create a legacy 
Search & Display campaign instead of an 
SNDS campaign.
If you still have legacy 
Search & Display campaigns, we recommend you either split or migrate them before we automatically migrate them for you. There are multiple options for migrating, from switching over entirely to 
SNDS, to splitting your campaign into parts each targeting Display, Search, and/or 
SNDS separately.
We have taken these steps in order to reduce the number of changes required to your code. If you have any further questions about this, or any other, topic, please contact us on the 
forum or via our 
Google+ page.
 - Mark R. Bowyer, AdWords API Team
 - Mark R. Bowyer, AdWords API Team