In this time and age, web applications are virtually ubiquitous. Some kind of website or a collection of web pages is typically the final product or the service of a complex structure that comprises of different databases, application servers, web servers, proxies, network balancers and appliances, and more. When it comes to monitoring duties, it makes sense to go just a step further and monitor a resulting site or web page in addition to all the backend assets that enable the said page.
The advantages as far as warnings and notifications go, are fairly limited, as failure to reach a web page is certainly a critical event, but it hardly gives any insight on what may be the actual problem if you haven't set up the correct metrics ...
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