AP Credits

Hello everyone! I have a few questions regarding what specific courses I will get out of and what the credits actually count towards. My AP Scores are as follows: AP United States Government and Politics 5, AP World History 4, AP Spanish Language and Culture 4, AP Macroeconomics 4, AP Chemistry 3, AP English Language and Composition 3, AP English Literature and Composition 3, and AP Biology 3.

That should get me credit for
-LIFE SCI, Unassigned, 8.0 units
-CHEM, Introductory, 8.0 units
-ECON, 2, 4.0 units
-ENGL, Unassigned, 8.0 units, EW (2X)
-POL SCI, United States, 4.0 units AH
-HIST, World, 8.0 units
-SPAN, 4, 8.0 UNITS, FL

can someone go more in depth as to what it means? Thank you!