This is a frequent question because there is a fair amount of information online that suggests this. Yes, it is true that freezing the seeds for 3-4 weeks can increase germination. Seed you buy here from The Strawberry Store is already preconditioned and is ready to be sowed.
If you buy seed elsewhere, ask them if they have preconditioned the seed. This is especially important if you’re buying the seed at the last minute. You don’t want to have to wait 3-4 weeks to sow them.