You rent a room in England. The agreement's heading is a clue, but the living arrangement and legal rules determine your rights. This course mainly concerns private assured periodic tenancies in England, with optional lessons on buying a home and understanding its tenure. Wales, Scotland and Northern Ireland have different systems.
Many private tenants hold an assured tenancy; not everyone who pays rent does. Resident-landlord arrangements, some student halls, holiday lets, company lets and older regulated tenancies can fall outside this system. Social housing needs its own guidance. Use Shelter's tenancy checker (opens in a new tab) or housing advice if the arrangement is unclear.
A central feature of a tenancy is exclusive possession: legal control over the space let to you, subject to applicable access rights. A room tenancy can give that control over your room while the kitchen is shared. Paying rent does not make you the property owner.