
When it comes to language learning, and reading in general I suppose, people tend to mention two different reading styles. You can either read intensively or extensively.
Intensive Reading
This is the slow way of reading. A person who uses this style would focus on understanding the passage 100%. This is someone who looks up every single word and taking notes. This style can help you examine new information that is presented to you in the passage.
The focus in on grammar and vocabulary learning.
Extensive Reading
This is the faster way of reading. A person who uses this style would work through the book without supportive resources like a dictionary. Using the knowledge that they currently have, they go through the book and try to guess/infer meaning. These readers focus on trying to achieve overall understanding. This style can help increase your reading speed and reinforce previously studied knowledge.
The focus is on enjoying and reinforcing the language.