If I want to write a simple message to the Log regarding a user action, what is the (best) way to do so? Should I use the 'DefaultLogger' or the 'CustomerActivityService'? And, more important, how? :)
If you want to write to log (usually exceptions and errors), use 'ILogger/DefaultLogger'. If you want to write to an user activity (usually information such as "viewing a category", etc), use 'ICustomerActivityService'.