Conversion optimization is __________.

investment that produces reliable month-over-month growth
focused on attracting customers through relevant and helpful content and adding value at every stage in your customer’s buying journey
the process of testing hypotheses on elements of your site with the ultimate goal of increasing the percentage of visitors who take the desired action
the technology, processes, and content that empower sales teams to sell efficiently at a higher velocity

The correct answer is:

the process of testing hypotheses on elements of your site with the ultimate goal of increasing the percentage of visitors who take the desired action.