susposeIf there is three actions ,then split these three 
actions by right click on mouse and select split action for 
make actions as reusable action and call them when your 
wantand also call them by call to existing action

if it is wrong plese correct it

2 ways
1.independent of each other
2.nested(2nd action is called by 1st)

To make our script more modularize, we split the actions

To achieve more efficiency.
To achieve Modularity.
To decrease code complexity.
if we splitted,then We can make any action as resuable at 
any time & we can copy or call that actions easily whenever 
required.
we can run each action rather than entire test ..by 
using "Run from Step" in any action.