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Hi there You can include the release/creation date if it is relevant to the industry - something like SaaS or item models or something like that where features are added. I would highly recommend if you do include information like this (and even if you don't, really) to check out Schema that will help you markup important information about your products, possibly helping your search engine performance. If it's just one type of product that doesn't change often or hasn't in years, it's not really necessary to add dates or anything though. Hope this helps! Good luck!

A clarifying question: Is this one page we are talking about, multiple pages, or an entire site?