Correct Answer: A

The correct answer is: To mark keywords or topics for easy searchability.

Key Points:

The primary purpose of hashtags in social media is to mark keywords or topics for easy searchability. Hashtags are words or phrases preceded by a hash (#) symbol. When you use a hashtag in a social media post, it makes your post searchable by that hashtag. This means that people who are interested in that topic can find your post by searching for the hashtag. For example, if you post a photo of your cat with the hashtag #cats, people who are interested in cats can find your photo by searching for that hashtag.

Additional Information:

Hashtags can also be used to connect with other people who are interested in the same topics, track trends and topics that are popular on social media, and promote your brand or business.