Logging is one of the most useful services that every production website should have.
When errors occur on your website you should be notified about them. Whilst you may think you have written perfect code and unit tested everything to the best of your ability errors can and will still happen. The database server may go down, a 3rd party website may be offline, the shared hosting environment of your website may suffer an outage, a previously undetected bug may occur and the list goes on.
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