What's the function of "through" in this sentence?
"It is a popular social networking app in America, through which you can share the wonderful feed and pictures in life instantly with people nearby."

Is that expression right??? What's the function of "through" in this sentence?

Question

What's the function of "through" in this sentence?
"It is a popular social networking app in America, through which you can share the wonderful feed and pictures in life instantly with people nearby."

Is that expression right??? What's the function of "through" in this sentence?

Answer

Through indicates that this is the medium - the means by which, or through which pictures can be shared.

Answer

"Through“ means "by." The sentence "through which you can share the wonderful..etc" can be written with the word "through" or without the word "through" - "which you can share the wonderful...etc"

basically "through" means "it is possible"