You can reach to your targeted audience + generate leads/revenue more often by achieving below things, this will ultimately helps you to get ROI (Return on investment) from the website.
Top position in Google for your product/service related keywords.
Showcase your product/service through social media websites like Facebook, LinkedIn, Twitter, Pinterest
Optimize your website which helps you to get fast ranking + visits & leads/revenue.
Email marketing
Paid marketing + Remarketing in Google/Bing and social media websites.