Many sessions and series on this platform have overlapping qualities beyond their topic, such as their style (practice problems, lecture, discussion, etc.), intended audience (by grade, etc.), purpose (introductory, review, etc.), etc. As much as tutors should elaborate on what their sessions are like through their descriptions, having tags would encourage them to think about their session structure. Most importantly, tags allow for learners to more efficiently search through sessions. They can filter through these general descriptors of sessions that they want (or don't want). This use case will be especially popular when there are many sessions to browse through; similar to how someone would search through products on a shopping site. Relevance to APs, etc. The AP category is long-debated for its necessity but weird ambiguity by separating "normal"/non-AP and AP topics. Sure, exact content and difficulty can vary from the two categories, but their goals are often the same: help learners master a concept. Ex. an introductory session in limits is largely the same in an AP and non-AP context. Certifiable AP tags accomplish the best of both worlds: a label for AP-oriented material without excluding them from their non-AP counterparts. An AP page should still exist, but searching a topic will display non-AP and AP content (unless filtered out by the user). Honorary certifications in an AP topic also can build off of the mastery video recordings: to get the tag, a tutor submits an honorary certification like they would for an individual topic (like we do for the current separate AP topics). However, this implies that they must certify themselves through mastery recording of the "normal" topic. An engineering difficulty is to limit this AP tag to only applicable topics and those the tutor is certified in the AP category for (Ex. certification in AP Calculus for the AP tag does not grant universal usage). This feels long overdue (and my fault for not pushing this months earlier) but I finally present my case here:) Engineering is somewhat moderate as it crosses UI/UX and certifications. Thoughts?