If a post doesn't have seo snippet when published, is it doomed?

Hi there

Recently I had someone telling me that if a post didn't have a seo snippet (I think that's what the text below the page title is called) then google wouldn't index it no matter if you add it later. Is that true?

submitted by /u/MrVulpe
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from Search Engine Optimization: The Latest SEO News https://www.reddit.com/r/SEO/comments/pvhmiw/if_a_post_doesnt_have_seo_snippet_when_published/>