It's December. Few people are looking online for real estate right now. You're probably gearing up for next year. December is as good a time to start thinking about how we might apply all the various marketing techniques at our disposal for the coming season.
Partly because if the Google Insight chart linked to above holds true for this year, then there may be a big jump in interest sometime next month.
In the past year we've heard a lot about social media. We've heard a few things about online advertising.