How can trigger is used for bulkifying records in Salesforce?

Hi Pranav,

Bulkifying Apex code refers to the concept of making sure the code properly handles more than one record at a time.

Originally ,  Trigger or method that ordinarily only receives a single record as input, will receive a hundred - to run correctly in this context (and others) it should be written to handle multiple records.When a batch of records initiate Apex, a single instance of that Apex code is executed, but it needs to handle all of the records in that given batch.  So if a batch of records invokes the the same Apex code, all of those records need to be processed as a bulk, in order to write scalable code and avoid hitting governor limits.

Here is the Example:-

trigger accountTestTrggr on Account (before insert, before update) {

List<String> accountNames = new List<String>{};
for(Account a: Trigger.new){
a.Description = a.Name + ':' + a.BillingState
}
}

If this trigger is invoked with a single Account or up to 200 Accounts, all records will be properly processed.