When Google indexes Coppermind pages, it grabs the a number of characters from the opening paragraph(s) of the page to generate a preview. If those sentences includes spoilers for recent releases, users of the wiki can get spoiled on accident, without ever visiting a page. We can use this template to exclude a portion of a page from Google's search results:

This is a relatively innocent opening sentence for a page, {{nosnippet|but there are spicy spoilers here, so they will still show up on the page, but not on Google}}.