Sarah Frier opens by tracing Instagram's rapid growth from small startup to massive global platform, using this specific detailed history to illuminate broader patterns in how contemporary social media platforms evolve and scale.

Why this detailed specific history illuminates broader patterns:

• Instagram's specific growth trajectory, extensively documented through Frier's detailed reporting, provides concrete illustration of broader patterns relevant to understanding social media platform evolution generally
• This detailed journalistic account, based on extensive direct sourcing and reporting, provides credible specific grounding for these broader illustrative patterns
• This opening establishes the book's foundational detailed historical approach, motivating its subsequent examination of specific significant developments throughout Instagram's history

This opening establishes the book's foundational approach, using Instagram's detailed specific growth history to illuminate broader patterns in social media platform evolution.