Hyper-v Host can be use standalone in small environments but in medium and large environments you need high availability.
Hyper-v Failover Clustering is the solution to keep high available with almost zero downtime when one of your HYPER-V Hosts encounter serious problem and must be bring offline.
In previous articles Use HYPER-V Live Migration without Failover Clustering - Part 1 explain how can use live migration in HYPER-V Hosts which is standalone and not in Failover Clustering.
Hyper-v Failover Clustering is the solution to keep high available with almost zero downtime when one of your HYPER-V Hosts encounter serious problem and must be bring offline.
In previous articles Use HYPER-V Live Migration without Failover Clustering - Part 1 explain how can use live migration in HYPER-V Hosts which is standalone and not in Failover Clustering.