Office 365 and G Suite are a suite of productivity tools that let you perform common business tasks 'in the cloud'. Office 365 also provides a comprehensive range of desktop applications — programs that you install on your computer as opposed to using in a web browser.
Both Office 365 and G Suite allow you to create documents, spreadsheets and presentations and collaborate with team members whilst doing so; they also provide video conferencing functionality and cloud storage.
(In case you’re not familiar with what cloud storage is, it basically means storing your files remotely — for example on Google’s or Microsoft’s servers — instead of on your own computer. This can free up space on your hard drive and make real-time collaboration on documents much easier).