Părerea mea este importantă.

Because Romanian usually uses the definite form of the noun before a possessive adjective.

• părere = opinion / an opinion
• părerea = the opinion
• părerea mea = my opinion

So Romanian often builds possession like this:

• cartea mea = my book
• casa mea = my house
• părerea mea = my opinion

This is different from English, where we do not need the in my opinion.

The -a is the definite article attached to the end of the noun. Romanian usually puts the at the end of the word instead of before it.

So:

• părere = opinion
• părerea = the opinion

This attached definite article is very common in Romanian:

• fată = girl
• fata = the girl

In părerea mea, that -a is part of the pattern used with possessives.

In Romanian, possessive adjectives usually come after the noun, not before it.

So:

• părerea mea = my opinion
• cartea mea = my book
• prietenul meu = my friend

This is one of the first word-order differences English speakers notice. English says my opinion; Romanian says something closer to opinion-the my.

Because mea has to agree with părerea, which is a feminine singular noun.

Romanian possessive adjectives change form depending on gender and number:

• meu = masculine singular
• mea = feminine singular
• mei = masculine plural
• mele = feminine plural

Since părere / părerea is feminine singular, you need mea:

• părerea mea
• cartea mea
• mașina mea

But with a masculine singular noun:

• tatăl meu = my father
• prietenul meu = my friend

Este means is. It is the 3rd person singular of a fi = to be.

So:

• Părerea mea este importantă. = My opinion is important.

In everyday speech, some speakers may use the shorter form e:

• Părerea mea e importantă.

That is very common and natural in conversation.

Leaving the verb out completely is generally not standard here. So Părerea mea importantă would sound incomplete.

Because the adjective has to agree with the noun it describes.

Here, importantă describes părerea, which is feminine singular. So the adjective is also feminine singular.

Compare:

• important = masculine singular
• importantă = feminine singular
• importanți = masculine plural
• importante = feminine plural

Examples:

• un lucru important = an important thing
• o idee importantă = an important idea

Since părerea is feminine, importantă is the correct form.

Yes. In Părerea mea este importantă, the subject is părerea mea = my opinion.

The structure is:

• Părerea mea = subject
• este = verb
• importantă = predicate adjective / description of the subject

So the sentence literally works like:

• My opinion
  • is
    • important

Yes. Opinie and părere can both mean opinion.

So these are both possible:

• Părerea mea este importantă.
• Opinia mea este importantă.

In many contexts they are very close in meaning. Very roughly:

• părere can feel a bit more everyday or personal
• opinie can sound slightly more formal or abstract in some contexts

But both are normal words, and both can mean opinion.

Yes, but the basic order here is the most neutral:

• Părerea mea este importantă.

You can change the order for emphasis, for example:

• Importantă este părerea mea.
• Este importantă părerea mea.

These versions are less neutral and may sound more emphatic, literary, or context-dependent. For a learner, the safest standard version is:

• Părerea mea este importantă.

The letter ă is a very common Romanian vowel. It is a short, central sound, similar to the unstressed a in English sofa for many speakers.

In this sentence:

• pă in părerea
• the last syllable of importantă

A rough pronunciation guide:

• Părerea ≈ puh-RE-rea
• mea ≈ meh-a (often closer to one smooth syllable or two very light ones depending on speech)
• este ≈ ES-te
• importantă ≈ im-por-TAN-tuh

This is only approximate, but the key point is that ă is not a full English a sound like in cat or father.

Here, mea is a possessive adjective, because it modifies a noun: părerea.

It tells you whose opinion it is.

Compare:

• părerea mea = my opinion → mea is an adjective
• A mea este importantă. = Mine is important. → here a mea acts more like a pronoun

So in your sentence, mea is functioning adjectivally because it goes with the noun părerea.

Because Romanian does not need a dummy subject like English it in this kind of sentence.

English says:

• My opinion is important.

Romanian says:

• Părerea mea este importantă.

The real subject is already there: părerea mea. There is no need for an extra word like it.

Romanian often avoids extra subject words when they are unnecessary.