So and such are used to strengthen the meaning of adjectives.
So is used before an adjective without a noun.
The film was so boring.
My neighbors are so loud.
Such is used before an adjective that comes with a noun.
It is such a lovely day today.
This water pipe is such a nuisance.
So and such are also used with THAT-clause.
The bride was so beautiful that I couldn’t believe it.
That dress was such a bargain that I had to buy it.