You might analyze exact match impression share data to get an idea of:

• the percentage of eligible impressions you received for searches that exactly matched content on your landing page
• the percentage of eligible impressions you received for searches that exactly matched your keywords
• the number of times your ads were shown on the Search Network
• the number of eligible impressions your broad match keywords received

The correct answer is: the percentage of eligible impressions you received for searches that exactly matched your keywords

Explanation:

You might analyze exact match impression share data to get an idea of the percentage of eligible impressions you received for searches that exactly matched your keywords.

Search Exact match IS: The impressions you’ve received divided by the estimated number of impressions you were eligible to receive on the Search Network for search terms that matched your keywords exactly (or were close variants of your keyword).

• 

•