Reading practice often gets divided into two camps: read difficult material carefully, or read easier material in large amounts.
Both are useful because they train different things.
Intensive reading
Intensive reading means slowing down.
You inspect vocabulary, grammar and difficult sentences closely. It is useful for extracting detail from valuable material.
Extensive reading
Extensive reading means keeping meaning in motion.
The material should be easy enough that you can read large amounts without stopping constantly.
Why extensive reading matters
Volume creates repetition, strengthens vocabulary and makes sentence patterns increasingly familiar.
Why intensive reading still matters
Some difficult passages are worth understanding properly, especially when they contain important or recurring language.
The mistake is using one mode all the time
If every page becomes a dictionary exercise, reading volume collapses.
If you never investigate difficult language, some gaps remain unnecessarily vague.
Use intensive reading selectively and extensive reading abundantly.