Research to do:
1. If it's specifically devoted to performing reviews, they should have a published submission process. Read it and see how out of line this is with what they normally do.
2. Who has purchased from you in the past? Do they fit in with the followers this blog seems to have?
3. Google reviews of the blog itself. You can usually find something from other people who have had good/bad experiences with this blog if it's mid-size or larger.
A couple of big questions to ask yourself:
1. Is it a risk you can afford to take right now if it is a bust?
2. Can you handle an influx of customers if it works out?
3. Can you afford to purchase advertising from the blog to follow up after the review?
4. Who is your target market? This is definitely something you should know if you're considering advertising your product. (
https://blog.etsy.com/en/2013/how-to-find-your-target-market/)Questions for the blogger (which you should send through the blog page to make sure that it is legitimately the blogger who is contacting you):
1. Average number of visitors per month.
2. References from companies that have been featured by them.