It means to emerge or arise at an opportune time, in response to the needs or trends of the time.
应顺应；运原指天命，泛指时机。旧指应天命而产生。现指适应时机而产生。
汉·荀悦《汉纪·后序》实天生德，应运建主。”
With the rise of the internet, many online education platforms have emerged in response to the needs of the time.
Learn the next connected idiom: 应运而生 (yìng yùn ér shēng) → 生机勃勃 (shēng jī bó bó)
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