SEO (search engine optimization) is something you must build into a self-hosted site yourself, not really affected by which hosting service you use as long as they are not wix or similar low end or free thing
if you do not want to deal with setting up and running your own server, roundme is a good option
Although we are focused more on the consumer 360 segment, you may want to try out Momento360 if you want a quick-and-easy free solution (I can imagine it would be useful if you want to do some back-and-forth with a client before you send them finals). We default to private and have multiple sharing control options, including via anonymous web link (example here), so you can pick/choose what to share. Viewers can view on the web.
There’s scant documentation (we’re working on it now!) but feel free to contact firstname.lastname@example.org if you have questions.
IVRPA - The International Virtual Reality Photography Association is an international association of photographers who create and produce 360° Panoramas and other Virtual Reality Content including 360° Video, 360° Virtual Tours, Gigapixel Panoramas, and more.
This website showcases both our members and VR Photography community enthusiasts, and serves as a central place for news and communication for the 360° VR industry.
Professional and amateur and 360° VR photographers are encouraged to Join IVRPA and participate on this website.