Recently, we've been getting a lot of new users who don't know the Stack Exchange way and provide answers to questions that are little more than anecdotes about a similar situation. These frequently end up being deleted since they don't add any value to the Q&A.
Some, however, have the grain of a proper answer in them, and with a little more detail in them, could be useful to the OP and future readers. Now, moderators can add notices to a post that needs some TLC. The two most commonly used on this site are "insufficient explanation":
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
and "citation needed":
This post does not cite any references or sources. Please help improve this post by adding citations to reliable sources. Unsourced material may be challenged and removed.
However, neither of these really address the types of posts that we're getting. "Insufficient explanation" doesn't work for a 500-word rant about roofing contractors (for example), and "citation needed" doesn't sound right asking for a link to some product, or a description of a technique.
Over on Pets Stack Exchange, they get a lot of anecdotal answers too, so they asked for and received a custom post notice to specifically address these kinds of answers:
Thank you for sharing your experience! Pets Stack Exchange answers require more context than an interesting anecdote alone can provide; this story-based answer really needs some authoritative references to support it. Please add links to help support the experience you're describing, or this answer might eventually be removed.
Should we ask for a new post notice for these answers, and if so, how should it be worded?