Which of the following is NOT a way to filter your HubSpot social inbox?

Filtering your HubSpot social inbox allows you to manage interactions more effectively and prioritize your responses. The correct answer highlights that "by Twitter" is not a valid filter option within the HubSpot social inbox functionalities.

HubSpot's social inbox primarily allows you to filter interactions based on specific criteria that are relevant to user engagement. Options like "by keywords" let you search for discussions that include specific terms, enabling you to participate in or monitor relevant conversations. "By engagement rate" helps you analyze how well your posts are performing in terms of likes, shares, or comments. "By user location" can provide insights into where your audience is interacting from, allowing for more tailored responses.

In contrast, filtering specifically by "Twitter" suggests a method of separating content based solely on the platform, which is not a standard filtering criterion in the HubSpot social inbox. Instead, the filters focus on content-related metrics rather than the channels themselves. This distinction clarifies why "by Twitter" does not fit within the range of filtering options available.