Like redirecting urls, it is also important to change domain name in google analytics in order to get proper updated google analytics data. It can be done in following steps which is really easy. Log into GA -> Click admin from bottom corner -> click property settings from the middle -> change property name and default url field with new domain name and url.
It is important to redirect to new domain link after migrating from old domain. More importantly, any old domain links needs to be redirected to new domain link after the migration. The way to do it is to take the help of htaccess file. So, create a new htaccess file in the document root of the old domain and drop this following code there. Without www:RewriteEngine On RewriteCond %{HTTP_...