A new study revealed that Facebook is falling in terms of user satisfaction losing thus significant market share to Google+.

American Customers Satisfaction Index (ACSI)/ForeSee Results E-Business Report showed that while Facebook performed well this year compared to the last it still ranked last among all the sites included in the study.

The report author Larry Freed described the Facebook user experience as "poor” saying Facebook has benefitted from "a monopoly of sorts" in the social networking market.

Freed believes that Facebook needs to consider how to improve customer satisfaction because things could change quickly for it.

"If Google can carry over their customer-centric ethos to Google+, Facebook could have serious competition that has the potential to very quickly erode its market share," he wrote in a draft of the report sent to IDG News Service.

Freed noted that Facebook increased its customer satisfaction score from 64 last year to 66 this year -- out of a possible 100 -- a sign the company "may be moving in the right direction, albeit very slowly."

"Facebook is clearly king right now, but if anyone can knock it off its throne, it would be Google," Freed wrote.