How to - Sharing blog post to 100,000s of social users

I think, sharing blog post to 100,000s of Facebook users is possible in following ways:

• Sharing blog post to relevent pages having 100,000s of FB users
• Sharing blog post to relevent groups having 100,000s of FB users

How to share blog post to 100,000s of people over Twitter and Pinterest.

Please share your tips and tricks?

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