Link in email template takes too long to redirect

I created an email template. In the template, I added a button with href to redirect to another page. Clicking on this button takes way too long to redirect. I have tried with http://google.com and many other url, they are all slow. Is there anyone here knowing how to improve the loading time?

I created an email template. In the template, I added a button with href to redirect to another page. Clicking on this button takes way too long to redirect. I have tried with http://google.com and many other url, they are all slow. Is there anyone here knowing how to improve the loading time?