Final answer:
The terms that serve as keywords associated with online content are D) Keywords. These words or phrases help improve the visibility of content in search engine rankings and are integral to the organization of online information.
Step-by-step explanation:
Terms that function as keywords associated with online content are essential to improving the visibility and searchability of digital information on the internet. These identifying terms make it easier for users to find relevant content when using search engines or browsing social media platforms.
Hashtags
Hashtags are used primarily on social media platforms. They are created by adding a '#' symbol in front of a word or unspaced phrase. Hashtags categorize content, making it discoverable to all users with interest in that hashtag's subject.
Tags
Tags are similar to hashtags; however, they are often used in blogging and article publishing to sort content. Tags are helpful in organizing articles within a website and do not necessarily need a '#' to work.
Links
While links can associate content with a subject, their primary function is to direct a user from one webpage to another, facilitating navigation on the internet.
Keywords
Finally, the correct option for terms that serve as keywords associated with online content is D) Keywords. These are the words and phrases that are used within content to improve its search engine ranking. They help indicate to search engines what the topic of the web content is about, hence making it easier for users to find relevant content based on their search queries.