How to use a photo to get more clicks for your tweet

Jennifer Wong at Search Engine Watch says: 

A recent photo in a tweet vs. no photo in a tweet experiment revealed that a linked photo results in 120 percent increase in engagement and 350 percent increase in clicks for a tweet. 

Additional findings from the experiment include:

• Retweets, replies and favorites aren't affected by tweet with a photo link vs. a tweet without a photo link.
• Visits to a site from a tweet with a photo link vs. a tweet without a photo link are the same even though a tweet with a photo spends twice as many advertising dollars.
• Within the same tweet, a photo link gets as many clicks as a URL link.

Depending on the goal of your Twitter campaign, adding a photo to your tweet might add additional value in terms of engagement but it also might just add costs with no additional benefit if you’re trying to optimize for website visits