How important is real-time data in digital marketing?

It is critical to learn about your visitors navigating patterns , browsing habits.
Learning about your visitors can improve your UX , inform you which pages are doing better and why?.
It also saves hours of Analyzing reports after the fact.

It is important because that is what sets digital apart from traditional marketing.
Google makes millions from being able to match advertising to users based on what they are searching for.

@Reem I think you've hit it bang on.
The question is not how important - whether real-time or not, data mostly points the way to better decision making and is important, but coming to the context of the question, I feel its more on the 'relative' importance of real-time data in digital marketing...
For Digital Marketing real-time data goes with the dynamic DNA of the online medium.
Real-time data is most important to increase relevancy of any content served to a user.
If the user finds what she sees as relevant, interest will increase (as will the potential to covert to a sales funnel), that is the ultimate objective.
Since digital marketing's strengths and uniqueness lies in personalization of messaging / solutions for better ROI, real-time data allows the medium to play to its strengths, allowing marketers to optimise campaigns, environments, device ecosystems and the such on the fly, arming them with a competitive advantage only this medium can provide.

Obviously, the new digital era is all about real-time.
So, the question here shouldn't be whether real-time is important or not, but rather how to make use of this real-time data.
I think that the sheer quantity of data available today is of limited use to digital marketers unless they have the ability to process it and act on it instantaneously.
With this said, a new question would arise: How can digital marketers make use of this influx of real-time data and translate it into increased sales?