Summary on Shusen Wang's tutorial: Boost New Items

New Items cannot compete with older item. Thus it is necessary to give new items a boost in search when they are created to guaranteed some impressions.

It is difficult to assign the boost score, and it often leads to giving too many impressions to new items. Thus limiting impressions is necessary. 

One way is to vary boost scores according to the impressions that have been served. (Ex: Create a table and vary the boost score by reducing the boost value depending on how close to the deadline and how many impressions that have been served.)

Vary the number of impressions based on the predicted quality of the item - give good item more impressions.

Reference: https://www.youtube.com/watch?v=QGD-1Feq1ZQ