Descriptive adjectives describe nouns and agree with them in number, gender, and position. In English, adjectives usually precede nouns but in Spanish they typically follow nouns. Spanish adjectives also agree with nouns in gender and number. Descriptive adjectives can follow the verb "ser" and still agree with the subject noun.

2. Descriptive adjectives are words that describe people,
places and things
1. In English, adjectives usually come before the words
they describe
E.g. The red car
In Spanish, they usually follow the words
E.g. El coche rojo

3. 2. Adjectives in Spanish agree with the nouns they modify in
number (singular or plural) and in the gender (masculine of
feminine)
Carlos es un chico
simpatico.
Carlos is a nice guy.
Adela es una chica
simpatica.
Adela is a nice girl.
Carlos y Adela son
(unos) chicos
simpaticos
Carlos and Adela are
(some) nice children.

4. 3. A descriptive adjective can also follow the verb SER directly.
When it does, it still agrees with the noun to which it refers, which
is the subject in this case
Mario es alto
Mario is tall
Karla es baja
Karla is short
Karla y Mario son
delgados
Karla and Mario are
thin.