can user customize tabs in lightning like we do in classic. If we have 3 users in profile system admin, then these 3 users can customize the tabs for themselves? because via App assignment tabs are getting customized on the profile basis. All the users see same tabs. Any help will be appreciated
You can finally personalize your Navigation in Lightning Experience as of Spring 18 release.
See the release notes here: Supercharge Your Productivity with Personalized Navigation in Lightning Experience