Reading is one of the two receptive skills of language learning (the other being listening). It is called a receptive skill because we receive the meaningful information given in a piece of writing (like a blog or website article) by successfully reading it.
In a way, reading completes the objective of writing. A writer writes something with the intention of sharing his or her thought, opinion, experience, or knowledge with others, but it remains incomplete until and unless a reader reads that piece of writing and successfully perceives the meaning of it. So, it is very important to acquire the skill of reading in any language learning.
Reading blogs and websites can effectively help you improve your reading skill. In addition, it also leads you to learning about different topics which, in turn, enhance your overall knowledge.