passing data from page to other page

New Member
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hey, i'm new to shopify

i want to make a wizard-like program consists of 3 steps (page for each step)

first step user enter his name and birth day

in second step i want to access these data to show suitable products for his age

i did couple research but i did not find any way to pass data or to save it other than passing it as tag in the url which is not enough because i want to pass both the name and birth day 

is there a specific way to pass data or any other work around ?

thanks ^_^