Ritengono importante il risultato.

Ritengono is the third-person plural present tense of ritenere, so it means they consider, they regard, or they deem.

In this sentence, ritenere is being used in the pattern:

ritenere + object + adjective

So:

• Ritengono importante il risultato.
• They consider the result important.

It is a fairly common and slightly formal way to express an opinion or judgment.

Italian often omits subject pronouns because the verb ending already shows who the subject is.

Here, ritengono ends in -ono, which tells you the subject is they.

So Italian normally says:

• Ritengono importante il risultato.

rather than:

• Loro ritengono importante il risultato.

You can say loro if you want emphasis or contrast, but it is usually unnecessary.

Because il risultato is singular.

Here importante describes il risultato, so it must agree in number with it. Since risultato is singular, the adjective is singular too:

• il risultato importante / ritengono importante il risultato

If the noun were plural, you would use importanti:

• Ritengono importanti i risultati.
• They consider the results important.

Also note that importante has the same form for masculine singular and feminine singular. Only the plural changes to importanti.

In this sentence, importante is not simply an adjective inside the noun phrase. It is part of the structure after ritenere, where the verb links the object to a quality or judgment.

So the structure is:

ritenere + adjective + object

or sometimes:

ritenere + object + adjective

That means both of these are possible:

• Ritengono importante il risultato.
• Ritengono il risultato importante.

Both mean essentially the same thing: They consider the result important.

The version you were given is perfectly natural, especially in more formal or written Italian.

Il risultato is the direct object of ritengono.

It is the thing being judged or considered.

So in:

• Ritengono importante il risultato.

the meaning is:

• They consider the result important.

You can think of importante as describing the object, not the subject.

Because Italian does not need essere in this kind of structure.

After verbs like ritenere, considerare, and similar verbs of judgment, Italian often goes directly to:

verb + object + adjective

or

verb + adjective + object

So:

• Ritengono importante il risultato.

literally works like:

• They consider important the result

even though natural English is:

• They consider the result important

So the idea of being important is understood without adding essere.

Yes. Considerano importante il risultato is also correct and very natural.

The difference is small:

• ritengono = they deem / they consider / they hold
• considerano = they consider

In many contexts they are interchangeable, but ritenere can sound a bit more formal or slightly more abstract.

Yes, usually.

Compare:

• Ritengono importante il risultato.
  = more formal, more analytical, often used in writing or serious discussion

• Pensano che il risultato sia importante.
  = also correct, a bit more straightforward and common in everyday speech

Both express a similar idea, but the grammar is different:

• ritenere + object + adjective
• pensare che + clause

Because Italian generally uses the definite article in places where English also often uses the, and sometimes even where English might omit it.

Here il risultato means the result, referring to a specific result or to the result as a defined thing in context.

So:

• il risultato = the result

Without the article, the sentence would not sound natural in this normal context.

Yes. Depending on context, possible English translations include:

• They consider the result important.
• They regard the result as important.
• They deem the result important.
• They think the result is important.

The exact English choice depends on how formal you want to sound.

It is the present indicative.

More specifically:

• infinitive: ritenere
• present tense:
  • io ritengo
  • tu ritieni
  • lui/lei ritiene
  • noi riteniamo
  • voi ritenete
  • loro ritengono

So ritengono means they consider / they consider now / they generally consider.

You might hear it, but it sounds a bit more formal or written than very casual speech.

In everyday conversation, people might more often say:

• Pensano che il risultato sia importante.
• Secondo loro, il risultato è importante.

But Ritengono importante il risultato is absolutely correct and natural, especially in:

• news
• academic writing
• business language
• formal discussion

A useful approximate pronunciation is:

ree-TEN-go-no

The stress falls on ten:

• ri-TEN-go-no

And the whole sentence is approximately:

ree-TEN-go-no eem-por-TAN-teh eel ree-zool-TA-toh

That is only an English-friendly approximation, but it can help at first.