It depends on which pools actually exist for the pair you're interested in. For most users, the type of pool is effectively fixed by what's already deployed:
- Stableswap — minimal loss and steady fees on like-priced pairs (e.g., stablecoins).
- WCPI / WStableswap — useful when custom asset weighting matters for the strategy.
If the pair you want to provide liquidity into is only available as one pool type, then that's the pool you'll use. Choosing the pool type at creation is not a self-service option in the interface — for new pools with non-standard configurations, see How do I decide between regular, WCPI, or stable pools?