Updated: Jul 21
If you’re struggling to use tiles in SharePoint online on Microsoft Office 365 then SharePoint online Tiles webpart (Promoted links web part) for Modern pages will help you.
Also, there are 7 reasons here to migrate to SharePoint online:
You can’t keep up with everything Microsoft is releasing. You find it hard to find Microsoft experts on other non-dedicated sites. There are just too many other subjects covered.
Problem: There is no out of the box (OOTB) webpart for "Promoted links" or "Tiles" webpart on SharePoint online modern UI pages (aka new experience). Many of companies build their intranet and heavily use that one since it will highlight important area in SharePoint so use can easily find them. Hero webpart will take huge space and users have to choose its existing option. Quick links webpart is also not a flexible option for intranet and doesn't have much option such as hove over.