Disclaimer: I own nothing of GI Joe, which is owned by Hasbro. Only the plot is mine and I make no money from this.
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Though there were standard procedures they followed, oftentimes the various missions the team got required a specific kind of preparation to properly arm themselves so as to complete those missions. This could be as complicated from a several layer defensive spell boundary to something as simple as carrying a specific, magically charged stone in their sigma suit for protection.
But the main point of all this was that they needed information to properly prepare. A single unknown thing could throw the entire mission off, which could have disastrous consequences. So with every new mission they got, every bit of information gleamed from it was carefully entered into their computer systems and cataloged as needed, ready to pull up at a later date if it was so needed.
It was a secondary objective of theirs, but it had helped the team countless times in the past and likely would continue to do so in the future. Not just for them, but for others too, once they were cleared to release some of that information to other sources.
In short, it was another way the Sigma 6 team tried to help make the world run smoother for all involved.