The time that a user waits between successive actions is 
known as Think time
Vusers use lr_think_time function to emulate user think time

waiting time between two Vuser action.i want wait few 
minites in between two action i can use think time.

It is the idle time, user with web application between one
request and another.In order to stop the actions b/w steps
think time is used.

It is the time, that a  normal user waiting between two 
actions.

Use of this think time is to simulate real time scenario.

We can limit the think time or we can modify the thinktime.

There is onemore timeparameter in Loadrunner is THRESHOLD 
TIME.
It is useful to limit the think time.i.e suppose we enter 
threshold as 5 sec, Loadrunner wont generate any Function 
into the script

Think time is nothing but the user take a time for entering
a data or input for sending request.

                   and
The user take a time for thinking i.e,what can i do

The time that a user waits between complte actions is 
known as Think time
Vusers use lr_think_time function to emulate user think time

In load runner Think time is time period taken by user for  
sending a request to server.
EX:suppose an user wants to check his\her gmail account so 
the time taken by user to enter the user name & pwd is the 
Think time & between this time period Server remains Ideal.

The time frame recorded by the tool when the user is idle
between 2 consecutive actions.