<!-- wp:paragraph --> <p>When an Account is updated and the Website is filled in, update all the Profile field on all Contacts to:</p> <!-- /wp:paragraph --> <!-- wp:list --> <ul><li>Profile = Website + ‘/’ + First Letter of First Name + Last Name</li></ul> <!-- /wp:list -->

TriggerExample3.tgr

trigger TriggerExample3  on Account (After Update)
{   
    if(Trigger.isAfter && Trigger.isUpdate)
    {
        Set<Id> AccountId_Set = new Set<Id>();
        new list<contact>();
        for(Account ac : trigger.new)
        {
            if(ac.website != null)
            {
                AccountId_Set.add(ac.id);
            }
        }
        
        if(AccountId_Set.size()>0)
        {
            List<Contact> Contact_List = [select Id,Firstname,Lastname,Profile__c,Accountid,Account.website from contact where Accountid in :AccountId_Set];
            for(Contact con : Contact_List)
            {
                if(con.FirstName != Null)
                {
                    con.Profile__c = con.account.website + '/' + con.FirstName.substring(0, 1) + con.lastname;
                }
            }
            update Contact_List;
        }
    }
}