ですTo be, Is

Similarly to だ, です is an auxiliary verb that is an expression of determination or assertion. It states that something 'is' a certain way. です is considered to be the polite variation of だ. Keep in mind though that although their roles are similar, both だ and です are standalone structures.

です connects to words in exactly the same way as だ, but is also regularly seen attached to the end of い-Adjectives.

Caution

Although です is regularly attached to the end of い-Adjectives, some may actually consider this incorrect Japanese, and it should not be used in formal writing. In daily spoken language/texting, however, it is completely normal.

The above example technically should not be used in formal writing. Despite this, in recent years, it is starting to become the norm.