Santosh 希望了解其网站访客是哪些人群，以便提升其品牌认知度推广活动的效果。他应利用哪些功能？请选择所有适用选项。

Santosh should use Audience Insights and the LinkedIn Insight Tag. Audience Insights provides detailed demographic and firmographic data about his website visitors, helping him understand who they are (e.g., job titles, industries, company sizes). This direct understanding of his audience is crucial for tailoring brand awareness campaigns effectively. The LinkedIn Insight Tag is a piece of JavaScript code that, when placed on his website, collects data on visitor behavior and allows for audience segmentation and retargeting. This data feeds into Audience Insights and enables more precise targeting for future campaigns. The "Broad Targeting Tool" is incorrect because it aims for wide reach rather than providing insights into existing visitors.