Social media strategy is the systematic planning and execution of content across platforms like Instagram, TikTok, LinkedIn, YouTube, and X to build audience relationships and achieve measurable business outcomes. Today's landscape demands platform-specific optimization where algorithm mechanics, content format selection, and engagement timing dictate visibility more than follower count alone. Understanding how each platform rewards different signals—watch time on TikTok, saves on Instagram, dwell time on LinkedIn—is critical for creators and brands competing for attention in an oversaturated environment where authenticity and strategic repurposing separate sustainable growth from temporary spikes.