What are the terminologies in the ads for laptop computers a

What are the terminologies in the ads for laptop computers and what criteria should I look for when purchasing one?

Criteria -

Good battery backup(4000mAH or more)

Good amount of memory ( 4GB or more)

Good amount of storage(1TB HDD or more)

Optimum graphics processor (2GB or more)

Octa core processor

Terminologies -

Sleek design

High performance

Light weight

Excellent battery backup