Some fo the Project Management activities done by any Project Manager is as follows(in no order):

-  Form the Project team 
-   Kick off the project with all the stakeholders (generally kick off consists of objectives, success criteria, and other things explained well)
-   Planning and preparing high level milestones
-   Communications to the team and stakeholders
-   Identify and manage risks
-   Preparing work break down structure
-   Assigning tasks to team from #4
-   Track the tasks
-   Ensure collaboration with team and all the stakeholders
-   Stakeholder management and support in executing the project
-   Status reports to senior management team
-   Ensure and check the project deliverables at each phase of the project  
-   Regular meetings and resolving issues/risks
-   Ensure on time, scheduled deployment of the project 
-   Ensure warranty and support
-   Lessons learned meeting, etc..