I recently answered the question "Which Is More Fundamental, Fields or Particles?" essentially by explaining what second quantization is and why it makes so much more sense than first quantization. The answer has been well received suggesting that some users benefited from a good explanation of second quantization. However, if I search "what is second quantization" I do not find my answer. This is not surprising because the question I answered does not have "second quantization" in the title or tags.
This raises the following question:
Sometimes when a user posts a question asking "Why X?", the best answer involves explaining topic Y. A user may post a good explanation of Y. If X and Y share no meaningful key words, users searching for the answer to "What is Y?" may not find the answer. Therefore, what should be done in this situation to help future users wondering about Y find the answer?