How do you they review your application?

Do admission officers actually review each application one by one or do they just rank the pool and admit from there?

SDSU uses your Eligibility Index and ranks/admits by major.

(High School a-g coursework GPA × 800) + SAT (Evidence-Based Reading and Writing, and Math) = Eligibility Index

https://admissions.sdsu.edu/freshmen/apply

Via Common Data Set - Rigor of secondary school record is very important along with GPA & test score (See Page 9)
https://asir.sdsu.edu/Documents/CommonDataSets/CDS_2019-2020.pdf