The givefirstborn is just the name the modder gave to the command to run the fix. The grid talk is because the memory fix allows for greater performance/stability when playing with higher ugrids. As for what you should do, here are the basic fixes that (imo) everyone playing on PC should be using:
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Enboost - Use this even if you're not using ENB for graphics. If you are using ENB for graphics, make sure you're using the more recent DLLs which contain the memory fixes and that your settings in enblocal.ini are configured correctly.
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Stable uGrids - requires SKSE
- Add the following line to your SKSE.ini (located in Skyrim/Data/SKSE, create one with notepad if it's not there to begin with) under [GENERAL]. This will help with saves where you have been upgrading or uninstalling mods.
- The fix that this thread is about.
This version allows you to configure the size of the memory blocks, stick with the default unless you know what you're doing.
- Safety Load is another SKSE plugin, it may be redundant with the above fix.