Two of the world’s biggest internet companies, Google and Facebook, are taking new steps to fight the rising tide of fake news — in other words, conspiracy theories and misleading information from no-name sites masquerading as news— that exploded on their platforms during this campaign cycle.

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Note added at 35 mins (2020-06-14 14:51:20 GMT)
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It's an idiom used to indicate an increase in the amount or strength of something, especially something that you must oppose, if you choose to use them, but you could also rephrase it to indicate the meaning in your words.
Here you can find the explanation as well as synonyms & other words.

https://www.macmillandictionary.com/dictionary/british/a-ris...

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Note added at 4 hrs (2020-06-14 18:45:07 GMT)
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With pleasure Mr. Adel, best of luck!