A blog on a commercial site is created with one simple goal-to attract traffic. Yes, it will follow information requests, which means that it will have a low conversion rate, but such traffic can be heated up and returned through retargeting, ultimately still getting sales.
In order for a blog on a commercial site to bring the expected result, two important conditions must be met:
1. Articles must be expert, high-quality, and fully answer the most common questions of the target audience.
2. Articles must be correctly optimized to meet the requirements of search engines.
You can deal with both points on your own, but if you do not know much about copywriting and content marketing, it is better, of course, to trust the professionals.