Informacija je važna.

• informacija = the subject, information
• je = is, the 3rd person singular present form of biti (to be)
• važna = important, an adjective describing the subject

So the sentence has the very common pattern subject + is + adjective.

Serbian does not have articles like English the and a/an.

So Informacija je važna can mean:

• The information is important
• Information is important
• sometimes even A piece of information is important, depending on context

Context tells you whether the noun is definite or indefinite.

It is in the nominative case, because it is the subject of the sentence.

The dictionary form of a noun is normally nominative singular, so informacija appears here in its basic form.

Because it agrees with informacija, which is a feminine singular noun.

In Serbian, adjectives must agree with the noun they describe in:

• gender
• number
• case

Since informacija is feminine singular nominative, the adjective also has to be feminine singular nominative: važna.

Compare:

• važan = masculine singular
• važna = feminine singular
• važno = neuter singular

A very common clue is the ending -a. Most Serbian nouns ending in -a are feminine.

So learners will usually recognize informacija as feminine right away.

There are exceptions in Serbian, but for this noun, feminine is correct.

Je is the 3rd person singular present tense of biti (to be).

So:

• ja sam = I am
• ti si = you are
• on/ona/ono je = he/she/it is

In this sentence, je matches informacija, which is singular:

• Informacija je važna. = The information is important.

Normally, in a full standard sentence, no.

You should say:

• Informacija je važna.

not just

• Informacija važna.

Serbian usually keeps the present-tense form of to be in this kind of sentence. You may see omission in headlines, notes, or very informal styles, but as a learner, keep je.

Yes, Serbian word order is fairly flexible, although Informacija je važna is the neutral, straightforward order.

You might also hear:

• Važna je informacija.

This changes the emphasis a bit, putting more focus on važna.

So both are possible, but the version you were given is the most basic one to learn first.

A rough pronunciation is:

• informacija ≈ in-for-MA-tsee-ya
• je ≈ ye
• važna ≈ VAZH-na

A few useful sound notes:

• j sounds like English y
• c sounds like ts
• ž sounds like the s in measure

So važna has the zh sound.

You make it negative by changing je to nije:

• Informacija nije važna. = The information is not important.

That is the standard way to negate this kind of sentence.

Two very common ways are:

• Da li je informacija važna?
• Je li informacija važna?

Both mean:

• Is the information important?

As a beginner, Da li je ... ? is often the easiest pattern to use.

Yes. Bitna is often used in everyday Serbian and can mean important, essential, or relevant, depending on context.

So:

• Informacija je važna.
• Informacija je bitna.

Both are natural.

A rough difference is:

• važna = important, significant
• bitna = important in the sense of essential or crucial

In many everyday situations, they overlap a lot.

In Serbian Cyrillic, it is:

• Информација је важна.

Serbian commonly uses both scripts:

• Latin: Informacija je važna.
• Cyrillic: Информација је важна.

They are equally Serbian; learners often start with Latin and then learn Cyrillic alongside it.