This is the 13964th most frequent Polish word.
postach
The Polish word "postać" means "figure," "character," "form," or "shape" in English, depending on the context.
Here 'postach' is used as the plural form of 'post' in locative case to refer to entries on a blog.
Widziałem jak w postach na blogu często pojawiają się linki do źródeł.
I noticed how in blog posts, references to sources often appear.
Here again 'postach' is the plural locative form of 'post,' this time indicating reactions.
Na postach widać było wiele reakcji ludzi.
There were many people's reactions visible on the posts.
In this sentence, 'postach' is similarly used as a locative plural form of 'post,' here discussing forum posts.