Step 1: Login to the wordpress admin control panel.
Step 2: From the left hand side pane, select Plugins.
Step 3: Click on Add New.
Step 4: Now the Add Plugins window opens up.
Step 5: Use the Plugin Search Bar to find a plugin, use the keywords like visitor tracker, visitor counter, etc.
Step 6: Browse the list of plugins.
Step 7: Click on the plugin name to see the plugin description.
Step 8: Select Install Now.
Step 9: Activate Plugin and check the visitors via wordpress admin panel.
