Order matters more than most people expect, and it's different depending on whether it's morning or night. The general rule is thinnest to thickest: a watery product goes on before a thick cream, because a heavy layer applied first blocks anything lighter from absorbing afterward.
In the morning, the sequence that makes sense is cleanser, then anything targeted like a light serum, then moisturiser, then sun protection last, since it needs to sit on top as the final layer facing the day. Skipping the last step and putting moisturiser on last instead defeats the point — sun protection works by being the outermost layer.
At night the sequence is similar minus the sun protection, but with more room for a heavier moisturiser since there's no makeup or SPF going on top afterward. This is also when a lot of people apply anything with a stronger active ingredient, on the logic that the skin repairs overnight without sun exposure interfering.
Waiting between steps is a small detail that gets skipped under time pressure but does matter for water-based products — a minute or two lets one layer absorb before the next goes on, rather than the two mixing together and diluting each other on the skin's surface.
None of this needs to be complicated to be effective. Two or three products applied in the right order will usually outperform six applied in a random one. this contact form is a good way to ask a supplier for guidance on where a specific product fits in that order.
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