What does the author mean by the words in bold?

Explanation:

Bold like words that stand out like Jack had this Big cat the bold word is big example again. Sam like to have a collection of stamps and it's big as a stamps again it's big

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.

i don't understand : /