Most template decisions get made once, by eye, and never revisited — a design looks good, it ships, and nobody actually checks whether a different layout would have performed better. Automation makes a real comparison nearly free: since the same data source can fan out to multiple templates, running two designs against identical underlying facts is a config choice, not extra work.
The setup
Wire your data source to two Apply Template nodes instead of one, each pointed at a different candidate design — same headline data, same stat, two different layouts, type treatments, or color emphasis. Post both (staggered, not simultaneously, so they don't cannibalize each other's reach in the same feed window) and let your real audience decide rather than your own eye.
What actually makes this a fair test
The comparison is only meaningful if the only thing that changes between the two posts is the template. Feeding both from the same automated source guarantees this — a manual A/B test where you hand-pick different stories for each template accidentally tests "which story was better," not "which design was better." Automation removes exactly that confound.
What to actually measure
Not likes — they're the noisiest signal on the platform and the most swayed by factors that have nothing to do with your design (see Instagram analytics: the metrics that matter). Reach tells you whether the design itself is getting shown to more people (a stronger visual can genuinely affect algorithmic distribution); saves tell you whether people found it worth keeping, which correlates with layouts that read as genuinely useful rather than just eye-catching.
Running it long enough to trust the result
A single post per template proves very little — one post can outperform another for reasons that have nothing to do with the template (a slightly better hook that day, a lucky posting time). Let the automation run each template across several posts before drawing a conclusion; the comparison gets meaningfully more reliable by the third or fourth pair, not the first.
What to do with the result
Once one template is clearly outperforming, retire the other rather than keeping both running forever — ongoing A/B testing past the point of a clear signal just splits your reach between a better and a worse option indefinitely. Use the losing template's ideas that did work (a color choice, a specific stat placement) as the starting point for the next comparison, rather than treating the loss as purely wasted.
Why this is worth doing at all
Template design decisions made once and never revisited are exactly the kind of thing automation is positioned to quietly improve in the background — the fan-out costs nothing extra to set up, and the alternative (guessing, once, and living with it) is the default every account falls into without a reason to do otherwise.