You would like to add 25 points to the visitor whose last visit time spent on the website is more than 15 min. Now choose the condition as “Last visit duration”, choose the criteria as “is more than” and enter the value as 15 min. Then, choose Add and enter 25 in the points text box.

If the visitor’s Last visit duration is more than 15 min then 25 points will be credited to the visitors Lead Score.