I suggest you to Work on all these factors:

1) Content Quality and Relevance 2) Backlink Profile 3) Site Structure and Technical SEO 4) Duplicate Content 5) User Experience 6) Google Penalties 7) Competitive Landscape 8)Algorithm Changes

It seems like there might be an issue with your website's visibility and optimization. Despite having 300 backlinks, your page traffic is at zero and only five keywords are showing. This discrepancy could be due to various factors such as poor keyword targeting, low-quality backlinks, or technical issues hindering your website's indexing and ranking. I'd recommend conducting a thorough SEO audit to identify and address the root cause of the problem.