It really depends on the keywords you are trying to rank high with Google that determines the backlink count you need. Most important is the quality of your website's content, if it is not good then sending potential customers there will be a waste of time and money. You will get free links if your content is awesome. Also, link building is very important you have to go make backlinks from relevant stuff also one of the most important backlinks is link insertion that will rank you higher.
hope it works
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