Alert messages are usually implemented to make sure users are notified about something important. To continue using the site one would normally need to click OK, however with DogQ you don't need to do anything - the message will be accepted automatically.
Conventionally, confirm dialog windows serve as safeguards when users perform certain signifact actions on a site, like deletion or changing of account information. To interact with a Confirm popup:
find element: OK / Cancel (depending on whether you want to accept or cancel the message)
Prompt popups can be used for numerous purposes. With this type of popups, users are asked to input a value before continuing. The process is almost the same as with the confirm popups, but instead of Find element you need to use the Find input - Type into combination:
type into: your answer
find element: OK / Cancel (depending on whether you want continue or cancel the prompt)