There are many great reasons to send save-the-date announcements like:
1. Advance notice for your loved ones to plan
2. Sharing your joyful news
3. Getting word out about your wedding website
However, I say YES! and one of the best reasons to do them is it allows you (the couple) to spend some time with your photographer before the wedding day. An engagement session will provide you with awesome images you can share, as you begin this incredible journey called marriage.
Lets face it, most grooms and even some brides are very camera shy and are worried about how they will look in their photos. Your wedding is the most important and stressful day to be front of the lens. You will feel so much more relaxed if you already know what to expect from you photographer. How they talk to you, ask you to move your body, their sense of humor...assuming they have one, and so much more. The engagement session can reduce if not eliminate that stress and worry for most couples.
So go ahead have an engagement session, and use the photos to make awesome save-the-dates to let the world know you are in love!