Data from social media services vendor ViTrue says Tuesdays are the day in which click-through rates are highest on content posted on Facebook-based brand pages: 9.89%.

Brand pages are like human profiles, except for companies. They typically aggregate news about the brand in question. Users can become "fans" of ones for which they feel an affinity, and receive updates from them on their news feeds.

Click-throughs for Facebook brand pages average about 6.76% — still much higher than the click-through rates for display advertising across social networks in general, including Facebook itself.

For its research, ViTrue factors in the number of fans a brand has. The total number of clicks on a post is divided by the fans that ultimately saw it, adjusted to reflect that every fan is not on Facebook at the same time, MediaPost writes.

For example, if a brand with 100 fans receives 5 clicks on a wall post, that represents a 5% CTR. But if only 20% saw the post, then the CTR rises to 20%.

The heart of ViTrue's research suggests certain days of the week might be better for launching a given promotion.

"This highlights the importance for marketers of having a well thought-out communication strategy for updating their brand page and when to create wall posts to get the optimum response," said CEO Reggie Bradford, who observes response rates are higher early in the week, then dwindle. Rates rise again come Sunday.

"The point isn't to say only do wall posts on Tuesdays," Bradford elaborated. "The point is that there are differences among days of the week and thinking has to happen behind the wall posts so you can maximize the impact."