You will be asked to ghostwrite (a byline will not be provided for these articles) unique content for blogs that provides real value, not a rehash of what you've googled on the topic. So preferably you should have real life experience in the topics you're writing about.
You only need to provide the content, no WordPress work is required.
Some articles will be short informational ones, of 1000-1500 words, while others will be long and in-depth guides of 2500-3500 words and more. A great part of the asked content will be buyer’s guides, so experience writing product reviews is desirable, but not essential.
The articles need to be written in a conversational tone, like a "friendly expert". They should be both informative and engaging/fun to read, not academic papers.