There are pros and cons to using both online and offline calendar tools. When using an online calendar such as Google Calendar, you are reliant on having access to an internet connection and there not being a problem with the server. When using an offline calendar such as Outlook, it can only be accessed when you are at your computer, but it does offer additional features and is more easily backed up for security. In all likelihood, you use a combination of the two in a bid to get the best of both worlds.
Using Google Calendar Sync, as the name would suggest, you can synchronise the calendar you maintain online with the one in Outlook. Synchronisation can be one or two way so you can update either calendar and the changes will be reflected in the other. This means that when appointments are added to Outlook when at home or in the office, they can be synced to Google so they can be accessed from elsewhere, including your mobile phone. Similarly, when out and about, you can use your mobile to add appointments to you Google Calendar, and the next time you fire up Outlook at home, synchronisation will ensure that your local calendar is up to date.
It’s a simple idea that works incredibly well and is far more versatile than opting to simply view an iCal calendar in Outlook. Synchronisation can be performed manually or automatically and is a great way to ensure that you never miss a date again.