They're = they are, missing letter is 'a'
their = possessive eg. "their shares"
there = as in "over there" or "there you go!"
Your = possessive "your shares"
you're = you are, the missing letter is 'a'
cafe vs cafes vs cafe's vs cafes' - all have completely different meanings. Google 'apostrophe usage'.
When you use the wrong words, how can you expect anyone to get the gist of what it is you're saying?