What exactly are Logical Database in Programs?

Hi Experts,
   While digging deep into the programs, using the T-Code SE93/SE38, we come across Logical Database.
what is the functionality and use of this Logical Database?
Best Regards,

Normally moderators reject unresearched questions, but this one has not been discussed much for it's security aspects.
In the ABAP forums you will find a lot of discussions about LDB's ("LDB" is your search term).
Please do a search and reconsider and focus your question more.
What is it about LDB's that you would like to discuss?
Cheers,
Julius

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