Reason 1: you will not automatically be able to see paused campaigns and ad groups. If you would like to have this as an option, select ‘Suggest paused ad groups’ as On.
Reason 2: ad groups with no live exact match keywords will not be available as an option to add queries to.
Reason 3: you will also not be able to add queries directly to campaigns with differing targeting settings from the source campaign. For example, if the source campaign for the query was targeting mobiles only, you will not be able to add the query to a campaign targeting all devices. If you would like to have this as an option, select ‘Enable targeting settings’. However, changing targeting group settings may impact other areas of Squared. Find out more about targeting groups
Reason 4: only campaigns with at least one exact match keyword will appear in the Add Queries list