Neurodivergent means anyone with a medical condition that could be seen as brain pathways either being disrupted, or gone, or rerouted. A few examples would be AD(H)D, Autism Spectrum Disorder (Including things such as Asperger’s), and Obsessive Compulsive Disorder.
Edit: Changed Autism to ASD, and switched out Schizophrenia to OCD as it’s more apt for the term as a whole.
In this case, it’s mainly a catch-all for folks to easily find help and or others with their conditions.