Cette agence embauche des personnes créatives pour ses campagnes.

Cette is the feminine singular form of the demonstrative adjective. It agrees with agence, which is a singular feminine noun.

The main forms are:

• ce = masculine singular
• cet = masculine singular before a vowel or mute h
• cette = feminine singular
• ces = plural

Also, cette can mean this or that depending on context. French usually does not insist on the same this/that distinction that English does.

Because agence is a grammatically feminine noun in French. Noun gender is something you usually have to learn along with the noun itself, for example une agence or cette agence.

There is not always a logical reason based on meaning. It is just part of how the noun works grammatically.

Embaucher is the infinitive, meaning to hire. In the sentence, the verb is conjugated in the present tense.

The subject is cette agence, which is third-person singular, so the verb form is embauche:

• j'embauche
• tu embauches
• il/elle/on embauche

So Cette agence embauche... means This agency hires...

Also, the final -e in embauche is not pronounced.

Here, des is the plural indefinite article. It means some or simply marks an indefinite plural noun.

So des personnes means people or some people, not the people.

Compare:

• des personnes = some people / people
• les personnes = the people

French often needs an article here even when English would just say people with no article.

Because many French adjectives normally come after the noun, and créatif / créative is one of them.

So:

• des personnes créatives = creative people

English usually puts this kind of adjective before the noun, but French often puts it after.

The adjective has to agree with the noun it describes. Here it describes personnes, which is:

• plural
• grammatically feminine

So créatif changes to créatives.

The forms are:

• créatif = masculine singular
• créative = feminine singular
• créatifs = masculine plural
• créatives = feminine plural

Because the adjective agrees with the noun personnes, not with the actual sex of the individuals. The noun personne is grammatically feminine, so any adjective that goes with it is feminine too.

So French can say des personnes créatives even for a mixed group, because the grammar follows personnes.

Because the owner is singular: cette agence = one agency.

In French:

• son / sa / ses = his / her / its, for one owner
• leur / leurs = their, for more than one owner

Since campagnes is plural, the correct form for one owner is ses:

• ses campagnes = its campaigns

If several agencies owned the campaigns, you would use leurs campagnes.

Also, French does not add another article here. You say ses campagnes, not les ses campagnes.

Here, pour means for in the sense of for the purpose of or to work on.

So pour ses campagnes means the agency hires creative people for its campaigns, meaning to help create, run, or support them.

It is about purpose or intended use, not physical location.