Email confirmation is required when signing up for a LogMeIn account to confirm that the email address used was a valid address.
In order to confirm that your email address is valid and working, you need to click on the link inside the email titled "LogMeIn - Please activate your account". If you have not received the email in your inbox, you should search through your spam and/or junk mail folders, as it may have been filtered to one of these folders.
The confirmation email will be sent to the email address you used when you set up your LogMeIn account. You will have 7 days from the time the account was created to confirm your account.