Why to make strong password for email account

lots of web users ask why we need strong password for any email so if
you are one of them and don’t know why we need it ! its simple for
security purpose for more details visit
http://www.email-customersupport.com/,
http://www.mailcontactnumbers.net/gmail-support-phone-number/ ,
http://www.omtechhelpcom.com/gmail-customer-support.php