ANSWER! In the mobile app, go to the Listing > scroll down and tap on Title > Internal Name
Now, I talked to Airbnb since I couldn't initially find the answer here and they told me they started a Beta called 'QLYS' in July 2017 that allowed hosts to add internal names. They told me it is no longer activated at Airbnb and that I could send support a message with my input. I'll do that, but this is still wonky. Here's the article from their internal Airbnb website he sent me:
As our product offering continues to evolve, it's important that we think about the hosting journey from the unique Volume Host perspective.
Quick LYS provides a method for Volume Hosts to add all of their listings to Airbnb quickly and efficiently, and optimize their listings' appeal. This is achieved by introducing new concepts to the LYS flow such as templating and listing duplication.
Important: This experiment is currently on hold. No additional hosts or listings will be opted in for the time being, though features such as "internal" name will still be visible for listings created through QLYS.
July 2017 50% Hosts with 2+ listings
User Journey
PDF
FAQs
What is "internal name"?
Internal name is a tool only available to Pro Hosts who set up their listings using QLYS. It allows them to set up a name for a listing that is only visible to them, not to guests.
How is "listing appeal" determined?
Listing appeal is measured by the following attributes presented to hosts as tips to "improve their listing"
Calendar Availability- Listing needs to have at least 1 available date for guests to book.
Price- Price needs to be in recommended range for market. (Site will tell host if price is too high or low)
Listing Description- Must have at least 4 sections filled in.
Bed Details- Must be completed.
Photos- Must have at least 7 listing photos.
If even 1 of these requirements is not fulfilled, the listing will appear as "low appeal"
Does "listing appeal" affect search placement?
No, this currently has no affect on search placement.