This is the 1313th most frequent Japanese word.
色々
Various; diverse.
The word '色々な' is used as an adjective here to describe a variety of books.
色々な本を読んで、知識を広げましょう。
Read various books to expand your knowledge.
Here, '色々' is used adverbially, indicating diverse ways of thinking.
私の趣味について色々考えました。
I thought about my hobbies in various ways.
'色々な' is again used as an adjective, describing the various kinds of experiences.