What tool is available to track marketing efforts under the CRM tab features?

The correct choice highlights the functionalities provided under the CRM tab in NetSuite that aid in tracking marketing efforts. Online forms and mail merging tools are significant because they facilitate the collection of leads and allow for personalized communication with prospects. Online forms can be used to capture customer information directly from websites, enabling businesses to gather valuable data which can then be analyzed for marketing effectiveness. Mail merging tools allow organizations to generate personalized correspondence and marketing materials at scale, ensuring that communications are relevant and engaging to customers. These tools are integral in tracking marketing campaigns and assessing the response from potential leads.

While the other options mention useful concepts within the realm of CRM and marketing, they do not directly align with the specific tools used for tracking marketing efforts in the same actionable way that online forms and mail merging tools do.