How long does it usually take before LPO and CRO measures show first significant results?

How long it takes to see first significant results from LPO and CRO measures depends on the starting point and the scope of the optimisation. Initial improvements in conversion rates can often be seen after just a few weeks, especially when targeted tests and adjustments are carried out. Lasting, comprehensive results usually appear within several weeks to a few months, provided optimisation is treated as an ongoing process and reviewed regularly.