Google’s John Mueller said on Twitter that it’s not necessary to use Dublin Core tags. Dublin Core meta tags can be used to describe digital resources (video, images, web pages, etc.), as well as physical resources such as books or CDs, and objects like artworks.
Recently saw someone recommend implementing Dublin Core for service area businesses. @marthavanberkel sine you're the smartest person I know regarding Schema, is that an impactful recommendation? @JohnMu does G care about DC.Title, DC.Description or DC.Subject if Schema exists?— Matt Lacuesta (@MattLacuesta) February 13, 2020
I'd just use normal titles & descriptions.— ? John ? (@JohnMu) February 13, 2020
How to optimize your web pages
Use the Top 10 Optimizer tool in SEOprofiler to find the elements that your web pages need to get high rankings on Google: