领英的广告形式大致分为哪四类？请选择四个答案。

LinkedIn's advertising formats are broadly categorized into four main types: Text Ads, Sponsored Content, Dynamic Ads, and Sponsored Messaging. Text Ads are simple, pay-per-click or impression-based ads appearing on the right rail or top of the page. Sponsored Content (企业推广内容) integrates directly into the LinkedIn feed, appearing like organic posts, and can include images, videos, or carousels. Dynamic Ads are personalized ads that automatically pull data from LinkedIn profiles, such as job titles or company names, to create highly relevant ads. Sponsored Messaging (推广消息), formerly known as Message Ads or InMail, delivers direct messages to users' LinkedIn inboxes. The other options listed are either campaign objectives (e.g., Conversion, Consideration, Awareness) or specific features within an ad format (e.g., Lead Gen Forms are a feature of Sponsored Content and Sponsored Messaging), not overarching ad formats themselves.