Within Office 365 for business you choose Office 365 Business (up to 300 employees) or Office 365 Enterprise. It offers all business Office programs for your employees within 1 licence. You can use a legal Office license without being tied down to high one-off costs. Office 365 also provides you with the best security by offering a free upgrade to the latest Office version as soon as it becomes available.
The biggest advantage: each user (each licence) can install and use Office on 5 devices simultaneously. Office 365 is therefore an ideal business Multi-Device licence.