ibeon silpaedo jungyohan gyeongheomieyo.

이번 means this time, this instance, or this round.

It comes from:

• 이 = this
• 번 = number, turn, occasion

So 이번 실패 literally means this time’s failure or this failure.

It is different from 이 실패, which would sound more like this failure in a direct pointing sense. 이번 실패 emphasizes that this is the failure from the current attempt or occasion.

도 means also, too, or sometimes even.

So 실패도 means:

• the failure too
• this failure also
• possibly even this failure

In this sentence, 도 suggests that this failure, just like something else already being discussed, can also be seen as an important experience.

So the nuance is not just This failure is an important experience, but more like:

• This failure too is an important experience.

Because 도 replaces particles like 은/는 or 이/가 in many cases.

Compare:

• 이번 실패는 중요한 경험이에요.
  = As for this failure, it is an important experience.

• 이번 실패도 중요한 경험이에요.
  = This failure too is an important experience.

So 는 marks the topic, while 도 adds the meaning of also/too.

You usually do not say 실패는도. The 도 takes that slot.

Korean word order is different from English.

The sentence breaks down like this:

• 이번 실패도 = this failure too
• 중요한 경험 = important experience
• 이에요 = is

So the structure is basically:

• [this failure too] [important experience] [is]

In Korean, the main verb or sentence ending usually comes at the end, and descriptive words come before the noun they describe.

Because 중요한 is the form used when 중요하다 modifies a noun.

• 중요하다 = to be important
• 중요한 = important + noun

So:

• 중요한 경험 = an important experience

If 중요하다 were ending the sentence, then you would use a different form:

• 경험이 중요해요. = The experience is important.

But here, important is directly describing experience, so it becomes 중요한.

This depends on whether the noun ends in a consonant or a vowel.

• after a consonant: 이에요
• after a vowel: 예요

경험 ends in ㅁ, which is a consonant, so:

• 경험이에요

Examples:

• 학생이에요 = is a student
• 의사예요 = is a doctor

So this is a standard noun + copula pattern.

Yes, from an English point of view, Korean often leaves out things that are understood from context.

English often needs something like:

• This failure too is an important experience.
• It is an important experience.

Korean does not need a separate word for it here.
The phrase 이번 실패도 already gives the topic/content clearly enough.

So the sentence feels complete in Korean without adding anything else.

Korean does not have articles like a, an, or the.

So 중요한 경험 could mean:

• an important experience
• the important experience

The exact interpretation depends on context.

In this sentence, English usually translates it as an important experience, because that sounds most natural.

This is a very common question.

• 이번 is used before a noun
• 이번에 is used more like this time / on this occasion

Examples:

• 이번 실패 = this failure / this time’s failure
• 이번에 실패했어요 = I failed this time

So in your sentence, 이번 is correct because it is directly modifying 실패.

Yes, very much.

It sounds like someone is trying to comfort or encourage another person by saying that the failure still has value. The idea is:

• failure is not meaningless
• you can learn from it
• it becomes an important experience

So the tone is positive and supportive, especially in contexts like advice, teaching, coaching, or encouragement after disappointment.

Here, 실패 is a noun meaning failure.

There is also the verb expression:

• 실패하다 = to fail

Compare:

• 이번 실패도 중요한 경험이에요.
  = This failure too is an important experience.

• 이번에 실패했어요.
  = I failed this time.

So the same core word appears in both noun and verb-related uses, but in this sentence it is clearly the noun failure.