Your property's online listing on #Zillow, #Trulia, etc. will get the most views the very first day that it hits the market.
It is extremely important to have all of your marketing up and running on day 1.
You don't want to miss out on any potential buyers because your home's pictures are not posted yet, right?
The pictures, marketing video, personalized website, etc. all have to be up and ready for the buyer to look at immediately.
If they are not ready, you run the risk of the buyer moving on from your listing and never returning to see your "coming soon" pictures.
Ask your agent to show you all their marketing BEFORE you hit the market and remind them to have it all ready on day 1.