Keyword Research

The mistake many people make is in saying "Most people are searching for the term 'fred blogs big widgets' and so we'll have to cater to them even though we have only just arrived on the internet scene and there are already hundreds of thousands of existing sites doing just that, a handful of them very well established and realistically unshakeable, and we have no more money".

If this sounds anything at all like your business model you have one and only one remedy.

Get more money!

When you've done that, spend it on keyword research.

Do the research that the competition didn't do and find that search term both related and sought-after that there's very little competition against. You can then use that to attract people to your site.
Like, for instance and going back to our earlier hypothetical scenario, "big widgets by/from fred blogs". Doing that means you still get to sell your goods and, together with a sensible internal linking structure and plenty of inbound links, you can ably compete against the big boys.

But you can't do that without keyword research.