The Purpose of Advertising in General
Every home seller likes to be assured  that their listing agent or the real estate company will run ads  featuring their home. Newspaper ads could be large display ads with lots  of listings or small classified ads featuring just your property. Ads  may also appear in local real estate magazines and your listing will  also show up on the Internet.
Of course the agents and companies will  run ads featuring your house, but not for the reasons you expect.
You see, the main job of advertising is  not to sell your house directly. Advertising creates phone calls and  some of those callers become clients of the agents answering the calls.  This builds up a pool of homebuyers looking for property in general, all  represented by selling agents. Multiply this by all the agents and  companies who also advertise homes, and there is a large pool of  homebuyers in the market at any given time – all of whom are represented by selling agents.
The agents representing those homebuyers  know about your home because it is listed in the Multiple Listing Service, has been on office and broker preview, and because your agent  may have also sent flyers to all the local real estate offices.
The agents match up their clients with  available homes, one of which may be yours. Then they show the homes to their clients, who eventually make an offer on one.  That is how  your house gets sold. Ads create a pool of clients, one of which buys  your home. Ads do not usually sell your house directly.
Real Estate Office Advertising
As mentioned previously, advertising your  home in newspapers and magazines rarely sells your home directly. More  likely than not, the buyer who eventually purchases your home will have  called on a totally different house. The same thing happens with buyers  who call on your house. They will probably buy something else.
You still want to be certain the real  estate company selling your house runs ads in the local and major  newspapers, whether they feature your house or not. The ads generate  phone calls to the real estate office, and if those agents viewed your  house on the office preview, they will be familiar with it. This is how  your property is sold.
Or you could be one of the lucky ones –  someone calling on your house may actually end up buying it.
You should also realize that when a  company advertises the homes they have for sale, there is more than one objective. Sure, the real estate office wants to generate phone calls  and sell houses, but the advertising also shows home sellers how  effectively they market properties. This impresses not only you, but  others who may be thinking of selling their home.
The advertising brings in more listings,  which generate more ad calls, which produces more buyers….and that is how real estate advertising really works.
Individual Agent Advertising
Individual agents may advertise your home  for the same reasons as companies do. They usually advertise in classified ads or in specialty magazines featuring houses available for  sale.
As in other types of advertising, these  ads rarely sell your home. Once again, the main goals of advertising are  to accumulate homebuyers as clients, and to impress you and future home  sellers with how well they market their listings. Some agents actually  do sell their own listings, but not that often.
It is much more productive and beneficial  if your listing agent directs most of his or her marketing efforts  toward other agents. Since this is "behind the scenes"  marketing that you don’t actually see, it is often difficult for you  to measure how hard the agent is working for you.
It is a mistake to measure your agent’s  effectiveness solely by counting the number of newspaper and magazine ads featuring your property. 
Neighborhood Announcements
When you first list your home many agents  send "announcements" to all of the other houses in your  neighborhood. This can be done in the form of postcards, a letter, or  flyers left hanging on the front door. These are important because your  neighbors might have friends who are looking to buy a house.
The announcements create "word of  mouth" advertising, which is the best kind. 
Open Houses
An open house when your property is first  placed on the market can be very important, but not for the reasons most homeowners think. Just like with advertising, most visitors to open  houses rarely buy the house they come to look at. They may not even know  the price of your home when they stop by to visit – they probably just  followed an "Open House" sign to your door.
An open house performs a similar function  to the neighborhood announcements – it lets all of your neighbors know that your house is for sale, and it practically invites them to come  "take a look." Being generally nosy, a lot of your neighbors  will take advantage of the invitation.
And they may tell their friends about  your house, creating more "word of mouth" advertising.
Of course, there are other reasons for  holding open houses, too. Listing agents who "farm" a  particular neighborhood use them as an opportunity to meet with other  local homeowners who will someday be selling their home. Your agent may  hope to list their homes in the future.
Open houses held after your home has been  on the market awhile do not usually serve a useful purpose in selling your home. Most of the neighbors already know your house is for sale and  open house visitors rarely buy the homes they visit.
However, if you really want more open  houses, your listing agent may allow other agents to hold it open. Open houses attract prospective homebuyers and agents hope to convince some  of those homebuyers to become their clients.