Your new client’s AdWords account has one campaign with one ad group that contains a list of hundreds of keywords.

Your new client’s AdWords account has one campaign with one ad group that contains a list of hundreds of keywords. Which best practice should you follow when re-organizing this client’s keywords?

• Create new ad groups with several keyword match types
• Create new ad groups with related keywords grouped together
• Remove half of the keywords from the ad group
• Create one ad group for every five keywords

Correct answer is: Create new ad groups with related keywords grouped together

Explanation: Use ad groups to organize your ads by a common theme. For example, try separating ad groups into the different product or service types you offer.

Read more here: https://support.google.com/adwords/answer/6298?hl=en