Facebook and Instagram Ads run through the same ad manager and the same targeting engine, but that doesn't mean they perform the same. The platform you lead with should depend on what you're selling and who's buying it, not a coin flip.
Facebook Ads work better for
- Older audiences. Facebook's user base skews older than Instagram's, so if your customer is 35+, Facebook usually has more of them.
- Detailed offers. Facebook's ad formats give you more room for text and context — useful for services, B2B offers, or anything that needs explaining before someone clicks.
- Retargeting and lead forms. Facebook's native lead form ads and retargeting tools are more mature and tend to convert warm audiences efficiently.
Instagram Ads work better for
- Visual products. Fashion, food, beauty, home decor — anything that sells on how it looks performs better in Instagram's feed and Reels placements.
- Younger audiences. If your customer is under 35, Instagram usually reaches them more efficiently per dollar spent.
- Brand awareness. Reels and Stories are built for quick, scroll-stopping content that builds recognition even before someone's ready to buy.
So which one first?
If you're not sure, start with a small test budget split across both and let three to five days of data tell you where your cost-per-result is lower. In our experience running Facebook and Instagram Ads for clients, the answer is rarely "either/or" once campaigns mature — it becomes about which platform leads and which supports. Visual, younger-skewing products usually lead with Instagram and use Facebook for retargeting. Service businesses and higher-consideration purchases often see the reverse.
The mistake to avoid
Don't run identical creative on both platforms and call it a strategy. What stops a scroll on Instagram (fast, visual, native-feeling) is different from what earns a click on Facebook (clearer, more explanatory). Treat them as two audiences that happen to share an ad manager, not one audience in two places.