# Starting my first experiment on a Strapi hero, what traffic split should I begin with?

Asked by Nadia Habib on 2026-08-23. Tags: strapi, experiments, traffic-allocation.

I wired our Strapi hero block to a slot and built two variants, so now I have to
actually set the experiment up. I am not sure whether to send all my traffic into
the test right away or ramp it slowly, and whether I can adjust it later once it is
running.

Thanks in advance.

## 1 answer

### Accepted answer from Marcos Passos (2026-08-24)

When you set the experiment up you pick three things: a primary goal, which has
to be an event you are already tracking, a traffic allocation percentage, and
your 2 to 5 variants. The traffic allocation is the share of visitors who enter
the test at all, so 30 percent means roughly a third see the variants and the
rest stay on your control.

On where to start: pick the allocation you are comfortable committing to and leave
it there. The one thing to avoid is changing the traffic distribution, or adding
and removing variants, once the experiment is running, because that invalidates
the statistics. So it is less "ramp it" and more "choose a share and let it run".
Results stay in progress until each variant reaches at least 1000 visitors, 25
conversions, and one week, and the statistics are Bayesian and computed on 100
percent of your data, with no sampling.

[Setting up an experiment](https://docs.croct.com/explanation/experiment) walks
through the goal and allocation, and [the winner thresholds](https://docs.croct.com/reference/analytics/experiment/flags)
cover when results are considered ready.

#### Reply from kyle_ops (2026-08-25)

for anyone else setting their first one up, take the do-not-change-it-midway
bit seriously. i bumped the allocation up two days in because a variant
looked good early and the numbers went useless, had to restart clean. there
is a whole thread on [why changing the split mid-run breaks the
stats](/answers/change-traffic-split-mid-experiment). pick the share and walk
away.