Hi Mustafa,
Increasing online sales would mean increasing your online store traffic. The more people to visit your store would mean the more potential buyers!
These are just some ways to generate traffic to your online store:
*Submit your product listings to Google product search
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*Use a free tool like Link hidden: Login to view to optimize your site for search engines.
*Set up a blog on your site and create some unique and interesting content. (this also helps in optimising your online store on search engines)
*Leverage traffic from eBay, Amazon or other auction sites. Set up an account with the username the same as your business name and list a few items at attractive prices. Put your website URL in your email signature tags and insert into template eBay emails. Set up an About Me page with photos of your business, yourself and of course, your URL.
*Set up an email newsletter on your website. Keeping in touch with existing customers encourages repeat sales.
*Another way is to join forums where your products are best labelled for (like the kennel club for pet supplies, or high tech clubs for gadget gurus). This will help you identify potential buyers to your store.
*Advertise your products in social networking sites - what better way to introduce your site than free marketing!
Smart marketing and advertising is the key to getting more sales. Letting people know that your site exists will help gain potential buyers.
Hope this helps.