Monitoring your sites uptime is a way of ensuring that your site is online and working as expected. Our premium tools monitor sites every 60 seconds however you can use the free service from uptimerobot.com to monitor your site every 5 minutes.
Create an account at uptimerobot.com
Click [ + Add New Monitor]
We would recommend creating a "Keyword Monitor" as this will look for a word of your choice on the site, the default ping monitor will not let you know if certain errors occur.
Fill in the form making sure to add a Keyword (Something unique to your site), choosing to alert when [Keyword Not Exists] and selecting which devices to notify.
When done, click [Create Monitor]