Bu slogan gençler için yazıldı; hedef kitle değişirse metni de değiştiririz.

Because bu slogan is the subject of the passive verb yazıldı.

In Turkish, -(y)ı / -(y)i / -(y)u / -(y)ü marks a definite direct object. But here the sentence is passive:

• Bu slogan gençler için yazıldı = This slogan was written for young people

So bu slogan is the thing that was written, not the object of an active verb.

Compare:

• Bu slogan gençler için yazıldı = This slogan was written for young people
• Bu sloganı gençler için yazdık = We wrote this slogan for young people

In the second sentence, bu sloganı is the direct object, so the accusative is needed.

gençler için means for young people or for the youth.

• gençler = young people
• için = for

A key point: için is a postposition, so it comes after the noun phrase, not before it like English for.

So Turkish says:

• gençler için = literally young people for

Also, için does not require the noun to take the accusative here. The plain form gençler is correct.

Turkish has no separate words for a or the.

So gençler can mean things like:

• young people
• the youth
• young audiences

The exact nuance comes from context.

In this sentence, gençler is a general group, so the bare plural sounds natural. Turkish often uses a plain plural where English might choose young people, the youth, or young audiences depending on style.

yazıldı means was written.

It breaks down like this:

• yaz- = write
• -ıl- = passive marker
• -dı = past tense

So:

• yazıldı = it was written

This is a very common Turkish pattern.

For example:

• Mektup yazıldı = The letter was written
• Metin yazıldı = The text was written

Because the sentence focuses on the slogan, not on who wrote it.

That is very natural in Turkish. If the writer is unknown, unimportant, or obvious from context, Turkish often uses the passive.

So:

• Bu slogan gençler için yazıldı focuses on the slogan itself

An active version would be:

• Bu sloganı gençler için yazdık = We wrote this slogan for young people

Both are possible, but they spotlight different things.

Yes. hedef kitle is a very common expression meaning target audience or target group.

• hedef = target
• kitle = mass / audience / group

So together:

• hedef kitle = target audience

You will often see it in marketing, media, business, and advertising contexts.

değişirse means if it changes.

It can be understood as:

• değiş- = change
• -ir- = aorist / simple present marker
• -se = conditional if

So:

• hedef kitle değişirse = if the target audience changes

In Turkish, a very common way to make a real or likely condition is:

• aorist + -se/-sa

That is why değişirse sounds very natural here.

Both forms exist, but they do not feel exactly the same.

• değişirse is the more neutral and common choice for a real, open condition: if it changes
• değişse can sound a bit more hypothetical, softer, or more dependent on context

In an everyday if X happens, we do Y statement, değişirse is usually the safest and most natural option.

So in this sentence:

• hedef kitle değişirse, metni de değiştiririz

sounds like a normal, practical policy statement.

This is an important pair:

• değişmek = to change
  This is usually intransitive: something changes by itself.
• değiştirmek = to change something
  This is transitive: someone changes something.

In the sentence:

• hedef kitle değişirse = if the target audience changes
• metni de değiştiririz = we also change the text

So the target audience changes, but we change the text.

English also has this difference sometimes:

• The plan changed
• We changed the plan

There are two things happening here.

1. The accusative is needed

metni is the definite direct object of değiştiririz.

• metni değiştiririz = we change the text

Because it refers to a specific text, Turkish uses the accusative.

2. The form becomes metni, not metini

The dictionary form is metin, but when a vowel-initial suffix is added, this word commonly drops a vowel:

• metin + -i → metni

This kind of vowel loss happens with some Turkish nouns.

So metni is the correct form here.

Here de means too, also, or as well.

So:

• metni de değiştiririz = we change the text too / as well

It adds the idea that if the target audience changes, the text changes along with it.

Important: this de is written separately because it is the additive particle.

It is different from the suffix -de, which means in / on / at.

Compare:

• metni de değiştiririz = we also change the text
• metinde = in the text

değiştiririz is the aorist form, and Turkish often uses the aorist in general statements, policies, habits, and the result part of conditionals.

So:

• hedef kitle değişirse metni de değiştiririz

can mean:

• If the target audience changes, we change the text
• If the target audience changes, we will change the text

In English, the future is often more natural here. In Turkish, the aorist is completely normal.

A future form like değiştireceğiz would sound more specifically planned or more tied to a particular future event.

Because Turkish often leaves subject pronouns out when the verb ending already shows the person.

Here:

• değiştiririz = we change / we will change

The ending -iz tells you the subject is we.

So Turkish does not need biz unless you want extra emphasis or contrast.

For example:

• Metni değiştiririz = We change the text
• Biz metni değiştiririz = We are the ones who change the text

The Turkish ğ is usually not pronounced like a hard English g.

In words like değişmek, it often:

• lengthens the previous vowel, or
• creates a slight glide

So değiş- is roughly like deyiş or deyiş, not deg-iş.

A practical learner approximation is:

• değişirse ≈ dey-iş-se
• değiştiririz ≈ dey-iş-ti-ri-riz

The most important thing is: do not pronounce ğ like the g in go.