Is it still useful to write blog in my website?

Hi, as a newbie, I always want to ask questions about anything I have no idea. Recently, I have start my blog writing plan. Yes, the www.xxxx.com is my website and I try to sell some products to gain profits. The blog is built under www.xxxx.com/blog where I publish my posts. The articles are original and I post one article each day. Until now, it has been last for 1 month.

So the question is, how do you think it. Is it…

Is it still useful to write blog in my website?