This sort of; this kind of; like this — a pre-nominal adjectival used to describe something close to the speaker or the speaker's idea.
こんなに寒い日は外に出たくない。
I don't want to go outside on a day this cold.
こんなことを言われると、誰でも傷つく。
If someone says something like that, anyone would be hurt.
こんな本、初めて読みました。
I've never read a book like this before.
彼女はこんな風に笑うことが多い。
She often laughs like this.