It's important to know when something goes wrong, it doesn't happen often, but when it does you need to know about it. The alert icon is designed to do just that.
The type of alerts you can expect is when integrations aren't working or having problems & when an email did not send. As Myphoner grows there will be more alerts added which ensures you'll be able to manage any issue that comes up.
For all alerts you'll be able to dismiss them and depending on the alert there will be different actions you can perform.