Latest / Social Media Marketing with Fexingo: Instagram, TikTok, LinkedIn, and Platform Strategy / Why Brands Are Ditching Hashtags for Keyword-Optimized Captions
Transcript
- Lucas: So you're scrolling Instagram and you see a post from a skincare brand — the caption is basically a dense paragraph starting with 'If you've been searching for a non-comedogenic moisturizer that won't break the bank, here's why this one works.' No hashtags in sight, maybe just a location tag and an @mention. That's not an accident. Luna: I've noticed that too. It's like brands are writing captions for Google, not for the feed. What's driving that shift? Lucas: It's social search — plain and simple. A 2025 study from Sprout Social found that 68 percent of users now search for products directly on social platforms. Think about it: when you want a new running shoe, do you open Google or TikTok? For Gen Z especially, the default is the app they're already in. Luna: Right — I've seen stats that 40 percent of Gen Z prefer TikTok or Instagram over Google for local searches. So if your caption says 'best running shoes for flat feet' instead of just #runningshoes, you show up in that search. Lucas: Exactly. And brands are catching on. Take Duolingo — their TikTok captions are famously long, packed with phrases like 'how to learn Spanish in 2026' or 'Duolingo streak tips.' They're not relying on hashtags to be discovered; they're relying on the caption matching what someone types into the search bar. Luna: It's almost like old-school SEO, but for a social feed. Keywords in the first 150 characters, using natural language that mirrors how people actually search. Lucas: That's exactly it. And the platforms are encouraging it. Instagram now lets you add alt text to images — which is also indexed for search — and TikTok's search algorithm pulls from captions, not just hashtags. So a well-optimized caption can get you discovered months after you post, whereas a hashtag-driven post dies in 48 hours. Luna: Wait — does that mean hashtags are dead? I feel like I still see brands using thirty of them on every post. Lucas: Not dead, but definitely demoted. Think of hashtags as category labels — they help with basic discovery, like #skincare or #fitness. But keyword captions are where the long-tail, high-intent search happens. A hashtag like #veganmascara might get you some reach, but a caption that says 'the best vegan mascara for oily eyelids that won't smudge' will match a specific search query from someone ready to buy. Luna: And that's the difference — intent. A search for 'best vegan mascara for oily eyelids' is someone in purchase mode, not just browsing. Lucas: Right. And the algorithm rewards relevance. If your caption matches the search query closely, you rank higher in the search results. Sprout's study also showed that posts with optimized captions saw a 33 percent higher click-through rate from search. That's not trivial. Luna: So what's the practical playbook? How does a brand actually rewrite its captions for search? Lucas: First, think about the questions your customer types into the search bar. Use tools like AnswerThePublic or even just the autocomplete on Instagram. Then front-load the caption with that exact phrase — ideally in the first sentence. Second, include backend keywords in alt text and location tags. Third, use natural language — don't stuff keywords awkwardly. Luna: And avoid the old tactic of hiding keywords at the bottom with a bunch of line breaks? I see that less now. Lucas: Yeah, that was a 2018 hack. Platforms got smarter — now they penalize that kind of keyword stuffing. It needs to read naturally. And honestly, that's better for the user too. A caption that reads like helpful information is more likely to get saves and shares, which also boosts search ranking. Luna: I've also seen brands using the first line of the caption as a headline — like '5 things I wish I knew before starting a podcast.' That hooks both the scroller and the searcher. Lucas: Exactly. And that format works especially well on LinkedIn, where search is becoming a bigger traffic driver. The platform's algorithm now prioritizes posts with keyword-rich first paragraphs, especially for professional topics like 'how to negotiate a raise' or 'project management tips for remote teams.' Luna: So it's really across all platforms — Instagram, TikTok, even LinkedIn. The era of just slapping on thirty hashtags and hoping for the best is fading. Lucas: If today's angle has given you something concrete to try with your own captions, that's exactly the kind of useful takeaway we aim for. And the way we keep these episodes ad-free and focused on actionable insights is through listener support. If you've found value here, you can toss a coffee our way at buy me a coffee dot com slash fexingo. It genuinely helps us keep the conversation going without sponsored interruptions. Luna: Yeah, it's a small way to say 'this matters to me,' and we appreciate it. Now, back to the keyword shift — one thing I've been experimenting with is using location tags as keywords. For a local coffee shop, tagging a neighborhood like 'Williamsburg' can bring in search traffic from people looking for 'coffee in Williamsburg.' Lucas: Great point. Location tags are essentially free keyword signals. And on TikTok, you can also add a 'business address' that becomes part of your searchable metadata. For small businesses, that's huge. You don't need a huge budget to appear in local searches — you just need to optimize what you're already posting. Luna: Let's talk about a concrete case. I recently saw a brand called 'The Ordinary' — the skincare company — and their Instagram captions are almost entirely keyword-focused. They'll say something like 'A high-strength vitamin C suspension for brightening, suitable for all skin types.' No hashtags except maybe #TheOrdinary. And they show up in search for 'vitamin C serum' consistently. Lucas: That's a great example because they're a brand with massive organic reach, but they still optimize captions like a startup. It shows that keyword optimization isn't just for small accounts trying to break through — it's a fundamental strategy for any brand that wants to be found. Luna: And they also use the 'products' tag feature on Instagram, which links directly to their shop. So the caption plus the product tag creates a seamless path from search to purchase. Lucas: That's the holy grail: search + shop. And platforms are betting big on this. Instagram's search results now include product grids, not just posts. So if your caption says 'affordable leather tote bag' and your product listing matches, you can appear right in the shopping tab search. Luna: So the takeaway for marketers: think like an SEO specialist, not just a content creator. What's the one search query you want to own, and how does your caption deliver that? Lucas: And test it. Write two versions of a caption — one hashtag-heavy and one keyword-optimized — and compare the search traffic after a week. I guarantee the keyword version wins, especially if you're targeting a specific product or service. Luna: One more thing — what about voice search? People are using voice to search on social too, like 'Hey Siri, find me a recipe on TikTok.' How does that affect caption strategy? Lucas: Voice search tends to favor conversational phrases. So instead of 'best vegan mascara,' you might also want to include 'what's the best vegan mascara for oily eyelids that doesn't smudge?' That natural language matches how people speak into their phones. It's a small tweak but can capture a different search funnel. Luna: And it makes the caption more engaging for human readers too. So it's really a win-win. Lucas: Exactly. The brands that are winning on social search are the ones that stop thinking of captions as afterthoughts and start treating them as landing pages. Every caption is an opportunity to be found, not just to be seen. Luna: And with the algorithm favoring search-driven content, this approach is only going to become more important over the next year. I'm curious to see if platforms start offering search analytics — like 'which keywords drove the most traffic to your post' — the way Google Search Console does. Lucas: Some third-party tools are already doing that. Sprout Social and Later have started adding search performance metrics. It's still early, but I expect every social media management tool will have a 'search insights' tab within the next year. The data is too valuable to ignore. Luna: So if you're a brand that hasn't updated your caption strategy yet, now is the time. The shift is happening — and the early adopters are already seeing the payoff. Lucas: Agreed. Let's leave it there for today. Next episode we'll dive into how brands are using Instagram's new 'Broadcast Channels' for community building — a totally different angle, but equally tactical. Luna: Looking forward to it. Until then, start rewriting those captions.