Which is the best bidding option for an advertiser who wants to drive more clicks from mobile devices

Which is the best bidding option for an advertiser who wants to drive more clicks from mobile devices?

• Mobile bid adjustments
• Target return on ad spend (ROAS)
• Target search page location flexible bidding strategy
• Cost-per-acquisition (CPA)

Correct answer is: Mobile bid adjustments

Explanation: Just as with desktop AdWords campaigns, mobile campaigns use bidding and targeting to determine where and when your ads show up.

A click may be worth more to you if it comes from a mobile device or a specific location, or at a certain time of day. By setting bid adjustments, you can increase or decrease your bids to gain more control over when and where your ad is shown.

Read more here: https://support.google.com/partners/answer/6209121?hl=en