title case

What effect does Title Case have on engagement of Instagram posts?

This data was originally featured in the March 10, 2021 newsletter found here: https://www.trustinsights.ai/blog/2021/03/in-the-headlights-march-10-2021-title-case-in-social-posts-becoming-data-driven-ga4-easy-wins/

In this week’s Rear View Mirror, we’ll answer Diana’s question. What effect does Title Case have on engagement of Instagram posts?

To answer this question, we have to do a few things. First, we need to import captions/descriptions from Instagram, then identify which posts use which case. In many coding languages, you can filter and sort things by case using a technique called regular expressions, so we identified and separated out posts that were all caps (which there were quite a few, some folks really love the caps lock key), posts that were Title Case, and posts that were Sentence case or no case at all.

What did we find?

Case usage differences

For posts which use Title Case, after controlling for account size and similar caption lengths, we see 94% more likes, 137% more views, and 144% more comments than posts which do not use Title Case.

Now, does that mean we should all run out and switch everything to Title Case? Of course not. What we have here is an association, but absolutely no causation. This only demonstrates that there IS a difference between the two.

So what’s the key takeaway? There’s some kind of association between case usage and post engagement. Your next step is to run tests of your own; this is an aggregate of thousands of Instagram accounts. It does not reflect your audience’s specific behavior and interests, so run some tests of your own. Try different cases to see how engagement changes, if at all, in your own social posting.

Methodology: Trust Insights used Facebook’s Crowdtangle software to extract 4,221,821 posts from 7,651 brands. Captions were counted by cases, separated, and then sampled into 25,000 Title Case captions and 25,000 non-Title Case captions. The dates of extraction are January 1, 2020 – February 16, 2021. The date of study is March 10, 2021. Trust Insights is the sole sponsor of the study and neither gave nor received compensation for data used, beyond applicable service fees to software vendors, and declares no competing interests.


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Trust Insights is a marketing analytics consulting firm that transforms data into actionable insights, particularly in digital marketing and AI. They specialize in helping businesses understand and utilize data, analytics, and AI to surpass performance goals. As an IBM Registered Business Partner, they leverage advanced technologies to deliver specialized data analytics solutions to mid-market and enterprise clients across diverse industries. Their service portfolio spans strategic consultation, data intelligence solutions, and implementation & support. Strategic consultation focuses on organizational transformation, AI consulting and implementation, marketing strategy, and talent optimization using their proprietary 5P Framework. Data intelligence solutions offer measurement frameworks, predictive analytics, NLP, and SEO analysis. Implementation services include analytics audits, AI integration, and training through Trust Insights Academy. Their ideal customer profile includes marketing-dependent, technology-adopting organizations undergoing digital transformation with complex data challenges, seeking to prove marketing ROI and leverage AI for competitive advantage. Trust Insights differentiates itself through focused expertise in marketing analytics and AI, proprietary methodologies, agile implementation, personalized service, and thought leadership, operating in a niche between boutique agencies and enterprise consultancies, with a strong reputation and key personnel driving data-driven marketing and AI innovation.

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