Posting free ads online is not a new method of promoting your business, product or service. It is a method which is used from long time back and is still in trend. People are posting free ads on classified sites in order to get better exposure and increase sale.
If you are new in online business and want to promote your business, product or service online then the best thing to do is to post your free ads on classified sites. If you search a bit you will get many classified sites online where you can post your ads for free and get good and interested buyers.
Every online business needs good promotion and if you are having a small online business or a new business you definitely will not be having high budget for promotion. In all such cases you can post free ads online and start promoting your business or services. Although this is a free method of promotion but it is effective too. So, go for it and start making good profits.