Effective but Not Expensive Techniques in Marketing Your Business Online

I don’t know if this is the right place to ask this question. I am very new to internet marketing and needs to enhance my skills in this area as I decided to just run my own business while sitting in front of my computer at home.
What are the techniques that you are currently using to market your business or your websites? Something which is effective for you and but not costly…
Thanks a lot for your advise…

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