If you are getting strong traffic based on good SEO and content but can't seem to capitalize on good lead generation and sales opportunities, you need to improve your CRO (Conversion Rate Optimization).
This is a popular method by good marketers who can analyze your selling proposition and "pull the right levers" to motivate a sale. Generally, these efforts are better for high ticket items but can work with lower priced transactions if used sparingly.
What is your sales process? How accurate is your sales forecasting? Do you understand how to fill a pipeline of prospects? Can you differentiate a referral lead from an online lead in your sales process?
These and many more factors are critical to mapping and structuring a proper sales process for optimal customer acquisitions.