Learn Turkish: Müdürün son maaşı çok iyi. - The manager's last salary is very good.

The base word is müdür (manager). To show possession (like adding 's in English), we add the genitive suffix. Because müdür ends in a consonant, we don't need the buffer letter n. Following 4-way vowel harmony, the last vowel 'ü' means the suffix becomes -ün, making müdürün (the manager's).

Why does maaş (salary) have an -ı added to it?

In Turkish, ownership is a two-part system. You put the genitive suffix on the owner (müdürün) and a possessive suffix on the owned object. Since the salary belongs to a third person (the manager), maaş takes the 3rd person singular possessive suffix -ı, becoming maaşı.

Why is son (last) placed between the two linked words?

Adjectives always come right before the noun they describe. Here, son describes the salary, creating the phrase son maaşı (last salary). The owner (müdürün) is placed before this whole phrase.

There is no verb like "is" in this sentence. Is that normal?

Yes! In Turkish, you often don't need a verb for "is" or "are" when describing something with an adjective. Simply placing the subject (müdürün son maaşı) next to the adjective (çok iyi) is enough to mean "is very good".