Det er jo en god idé at læse teksten igen.

Jo is a very common Danish particle that adds the sense of as you know, after all, or obviously.

In this sentence, it suggests that the speaker sees this as something fairly clear or shared:

• Det er en god idé at læse teksten igen. = neutral statement
• Det er jo en god idé at læse teksten igen. = It’s obviously / after all / you know a good idea to read the text again

Very often, jo is not translated directly into natural English, but it still changes the tone.

Det here is a dummy subject, just like it in English It is a good idea...

Danish often uses det er to introduce general statements:

• Det er vigtigt... = It is important...
• Det er en skam... = It is a shame...
• Det er en god idé... = It is a good idea...

So det does not refer to a specific object here. It is just the normal grammatical subject.

Because idé is a singular countable noun, and in Danish you normally need an article when you mean a good idea.

So:

• en idé = an idea
• en god idé = a good idea

Also, idé is a common-gender noun, so it takes en, not et.

Here at is the infinitive marker, like to in English.

• at læse = to read

The phrase at læse teksten igen explains what the good idea is:

• Det er en god idé = It is a good idea
• at læse teksten igen = to read the text again

So the whole structure is very similar to English: It is a good idea to read the text again.

Teksten is the definite form of tekst, meaning the text.

In Danish, definiteness is often shown by adding an ending to the noun:

• en tekst = a text
• teksten = the text

So teksten suggests a specific text that is already known from the context.

It is made from:

• tekst = text
• -en = the definite singular ending for many common-gender nouns

So:

• en tekst = a text
• teksten = the text

This is one of the most important features of Danish nouns: instead of always using a separate word like English the, Danish often attaches the definite article to the end of the noun.

Igen means again, and in this sentence it naturally comes after the object:

• at læse teksten igen

That is the normal, natural order here:

• infinitive marker: at
• verb: læse
• object: teksten
• adverb: igen

A learner might want to say something like at læse igen teksten, but that is not the normal word order.

Yes. The sentence would still be correct:

• Det er en god idé at læse teksten igen.

That would simply sound more neutral and less conversational.

Adding jo makes it sound more like the speaker expects agreement or treats the point as obvious/shared.

In læse, the letter æ is a vowel sound that does not match English perfectly.

A rough guide:

• læse sounds approximately like LEH-sə or LEH-suh

The æ is somewhat like the vowel in English cat, but not exactly the same.

So the important thing is:

• læ- has an open front vowel
• the word has two syllables: læ-se

If you are learning pronunciation, it is worth listening to native audio, because Danish vowels are hard to guess from spelling alone.

The accent in idé helps show the stress pattern and reflects that it is a loanword.

The stress falls on the last syllable:

• i-DÉ

That is different from many native Danish words, which often have stress earlier in the word.

For a learner, the most useful point is:

• remember the stress is at the end
• keep the noun form en idé

Not a full finite clause. It is an infinitive phrase.

It has:

• at
  • infinitive verb (læse)
• an object (teksten)
• an adverb (igen)

But it does not have a finite verb like læser or læste.

So the whole sentence consists of:

• a main clause: Det er jo en god idé
• an infinitive phrase explaining the content: at læse teksten igen

A little, yes, but not without changing the style or emphasis.

The standard version is:

• Det er jo en god idé at læse teksten igen.

You might also hear other structures in different contexts, but this version is the most natural and straightforward.

For example, moving igen or removing jo changes the feel of the sentence, even if the basic meaning stays similar. So for a learner, this sentence is a good model to copy as it is.