What is considered viral on Instagram? Viral posts on Instagram typically have high engagement rates and spread quickly through shares and likes. A viral post will garner thousands or even millions of interactions. Going viral on Instagram takes a combination of great content, timing, influencer marketing and luck. The algorithm favors content that gets a lot of engagement quickly. Use relevant hashtags, encourage shares, collaborate with influencers, and post visually appealing content to increase your chances of going viral.