apex best practices in salesforce
trigger accountTestTrggr on Account (before insert, before update) {
List<String> accountNames = new List<String>{};
//Loop through all records in the Trigger.new collection
for(Account a: Trigger.new){
//Concatenate the Name and billingState into the Description field
a.Description = a.Name + ':' + a.BillingState
}
}