Literaturo gravas por ŝi.

Because gravas is a normal Esperanto verb built from the root grav-.

• grava = important
• gravas = is important, matters

So Literaturo gravas por ŝi means something like Literature is important to her or Literature matters to her.

You could also say Literaturo estas grava por ŝi, which is very close in meaning. But Esperanto often uses roots directly as verbs in this neat, compact way.

-as marks the present tense in Esperanto.

So:

• gravas = is important / matters
• gravis = was important / mattered
• gravos = will be important / will matter

This ending never changes for person:

• mi gravas
• vi gravas
• ŝi gravas

The subject changes, but the verb ending stays -as in the present tense.

Esperanto has the definite article la, but it is used only when needed.

Here, Literaturo can mean literature in general as a concept, so no article is necessary.

Compare:

• Literaturo gravas por ŝi = Literature is important to her
• La literaturo gravas por ŝi = The literature is important to her

The second version sounds more specific, as if you are talking about some particular literature already known from context.

The ending -o marks a noun in Esperanto.

So:

• literaturo = literature
• libro = book
• muziko = music

This is one of the most helpful parts of Esperanto: word endings clearly show the part of speech.

Because ŝi is not the direct object here. It is part of a prepositional phrase: por ŝi = for her.

• ŝi = she
• ŝin = her (direct object)
• por ŝi = for her

In this sentence, literaturo is the subject, and gravas is the verb. The phrase por ŝi tells us for whom literature is important.

So ŝin would not fit here.

Because in Esperanto, a noun or pronoun after a preposition is usually not in the accusative.

So:

• por ŝi = for her
• kun ŝi = with her
• al ŝi = to her

The -n ending is mainly used for direct objects and some motion expressions. After a normal preposition like por, you usually use the basic form.

In natural English, this sentence is often translated as Literature is important to her, but Esperanto uses por ŝi, literally for her.

So here por ŝi expresses the idea that literature is important from her point of view or in her life.

English and Esperanto do not always use the same preposition, so it is best to learn the whole pattern:

• X gravas por iu = X is important to someone

ŝi is pronounced roughly like shee in English.

A few details:

• ŝ sounds like English sh
• i sounds like the ee in see

So ŝi = shee

It means she.

A natural pronunciation is approximately:

lee-teh-rah-TOO-roh GRAH-vahs por shee

A few important points:

• Esperanto stress is usually on the second-to-last syllable
• literaturo → li-te-ra-TU-ro
• gravas → GRA-vas
• ŝi is one syllable

Yes, Esperanto word order is fairly flexible, though some orders sound more neutral than others.

The most neutral order is:

• Literaturo gravas por ŝi.

You might also see:

• Por ŝi literaturo gravas.

That version gives more emphasis to por ŝi. But for learners, the standard subject-verb-other-elements order is the safest choice.

No. Esperanto does not capitalize all nouns.

Here Literaturo is capitalized only because it is the first word of the sentence.

In the middle of a sentence, it would normally be:

• Ŝi diras, ke literaturo gravas por ŝi.

Only proper names and sentence beginnings are capitalized in normal Esperanto writing.

Not exactly.

Literaturo means literature, not the activity of reading. It refers to literary works or literature as a field.

If you wanted Reading is important to her, you would use a different word, such as:

• Legado gravas por ŝi.

So:

• literaturo = literature
• legado = reading

ŝi is a personal pronoun meaning she.

Some related pronouns are:

• mi = I
• vi = you
• li = he
• ŝi = she
• ĝi = it
• ni = we
• ili = they

In this sentence, ŝi appears after a preposition, so it keeps its basic form.

Yes. gravi is a very common verb meaning to be important or to matter.

For example:

• Mono ne gravas por mi. = Money is not important to me.
• Tiu decido tre gravas. = That decision matters a lot.
• Familio gravas por li. = Family is important to him.

So the pattern in your sentence is very normal Esperanto.