“Can you go grab a jar of pasta sauce from the next aisle?”
You're grocery shopping with your son. You want to get pasta sauce, but it's in a part of the store that you've already been to. You ask your son this.
Can you go grab a jar of pasta sauce from the next aisle?
In casual English, you can sometimes use the word "grab" to mean "get". It means that you want someone to get it and bring it to you.
Here are some other examples of "grab" used in this way:
Jason, go grab your sister. I need her help with this.
Use "from ___" to tell where the thing that's being grabbed is:
Can you grab my screwdriver from the drawer in the basement?
One other point: "grabbing" something means that you get it quickly. If it's going to take a long time to get something, don't use the word "grab".
A jar is a glass bottle with a wide opening at the top. Pasta sauce is sold in a jar in the U.S.
An aisle is a space in between rows of things, like between seats or shelves. Most stores have aisles with different types of items on each aisle.
In the example above, "The next aisle" means "the aisle next to this one". It doesn't necessarily mean the one that you're going to next.
In casual speech, you say "go (do something)" to mean "go (somewhere) and (do something)". For example:
Do you want to go see a movie?
This means to go to a movie theater and watch a movie.
Could you go find me a screwdriver somewhere?
This means to go to the place where tools are kept and find a screwdriver for the speaker to use.