The auction platform does not include native blogging functionality. If you plan to blog, then you can either install a blogging platform (like WordPress) on a subdomain of your website with the auction platform installed on the primary domain, or vice-versa.
Our two cents: Most auction companies do not have the resources or long-term commitment to creating the kind of high-quality content that blogs require in order to work as an effective inbound marketing strategy. If you visit auctioneer blogs that are still up and running, you’ll usually find a few decent posts early-on, and then they resort to just talking about their upcoming auctions on the blog. Well, if you are just going to talk about your auctions, why not do that on the auction platform where your audience can actually engage with your content in a meaningful way?