You’re already familiar with SaaS — it’s cloud-based apps like Facebook, LinkedIn, Twitter, Salesforce, and Google Apps.
Companies that deliver these products manage everything, including updates, runtime, data, virtualization, servers, storage and security. All you do is download the apps. SaaS apps are usually related with email systems and collaboration, customer relations management (CRM), and benefits management.
The only potential problem with SaaS is Shadow IT — employees can download apps without IT permission, which can create conflict with other systems. It’s best to make the IT manager aware of all the apps you company is using.