Jeg læser også beskederne i chatten, når læreren deler et vigtigt ord.

In Danish, the definite article is usually attached to the end of the noun instead of standing as a separate word.

So:

• en besked = a message
• beskeder = messages
• beskederne = the messages

The ending -ne here marks definite plural.
So jeg læser beskederne means I read the messages.

For the same reason as beskederne: Danish often puts the definite article at the end of the noun.

So:

• en chat = a chat
• chatten = the chat

After a preposition, this is very common:

• i chatten = in the chat

You would only use den chat in more special situations, for example for emphasis or when adding an adjective:

• den store chat = the big chat

Også means also or too.

In this sentence:

• Jeg læser også beskederne ...

it means I also read the messages ...

Its position is natural in Danish because it comes after the verb in this main clause. Danish word order often places sentence adverbs like også in that area of the sentence.

Compare:

• Jeg læser også beskederne. = I also read the messages.
• Jeg også læser beskederne. = not natural Danish

Because når læreren deler et vigtigt ord is a subordinate clause.

Danish normally uses a comma before subordinate clauses introduced by words like:

• når = when
• fordi = because
• at = that
• hvis = if

So the comma in:

• Jeg læser også beskederne i chatten, når læreren deler et vigtigt ord.

is standard Danish punctuation.

Here, når means when in the sense of something that happens repeatedly or generally.

So this sentence suggests something like:

• Whenever / when the teacher shares an important word, I also read the messages in the chat.

This is different from da, which is usually used for a specific event in the past:

• Da læreren delte ordet, læste jeg chatten.
  = When the teacher shared the word, I read the chat.

So:

• når = repeated, general, or future when
• da = one specific past when

Because after når, you have a subordinate clause, and subordinate clauses usually keep subject + verb order in Danish.

So:

• når læreren deler et vigtigt ord

is literally:

• when the teacher shares an important word

In a main clause, Danish often uses verb-second word order, which can create inversion:

• Nu deler læreren et vigtigt ord.
• I dag deler læreren et vigtigt ord.

But after a subordinating word like når, the normal order is:

• når læreren deler ...

Because ord is a neuter noun in Danish.

Danish nouns are mainly either:

• common gender: take en
• neuter: take et

So:

• et ord = a word

When an adjective comes before a neuter singular noun, the adjective usually takes -t:

• vigtig = important
• et vigtigt ord = an important word

Compare:

• en vigtig besked = an important message
• et vigtigt ord = an important word

Deler is the present tense of at dele, which basically means to share.

In this context, læreren deler et vigtigt ord means the teacher is sharing a word with the class, for example in a lesson, presentation, or chat.

Depending on context, English might translate it as:

• shares
• posts
• gives
• puts out

But the core idea is share.

In this sentence, i chatten is the natural choice and means in the chat.

Danish often uses i for being inside something conceptual or digital, such as a conversation, text thread, or chat space.

• i chatten = in the chat

Sometimes learners expect på because English uses on for many online things, but Danish does not always match English prepositions directly.

So the safest thing here is simply to learn:

• i chatten

as the natural expression.

Læser is the present tense of at læse = to read.

So:

• at læse = to read
• jeg læser = I read / I am reading

Danish present tense is usually formed with -r:

• at dele → deler
• at læse → læser

Notice that Danish present tense can cover both English meanings:

• I read
• I am reading

The exact meaning depends on context.

Because Danish usually expresses the by adding an ending to the noun.

That is why you get:

• chatten = the chat
• læreren = the teacher
• beskederne = the messages

This is one of the biggest differences from English. Instead of saying the teacher, Danish usually says læreren as a single word.

The sentence has:

1. a main clause
   
   • Jeg læser også beskederne i chatten
2. a subordinate clause introduced by når
   
   • når læreren deler et vigtigt ord

So the structure is:

• I also read the messages in the chat, when the teacher shares an important word.

A helpful breakdown is:

• Jeg = I
• læser = read / am reading
• også = also
• beskederne = the messages
• i chatten = in the chat
• når = when
• læreren = the teacher
• deler = shares
• et vigtigt ord = an important word

Then Danish would use inversion in the main clause.

So:

• Når læreren deler et vigtigt ord, læser jeg også beskederne i chatten.

Notice what changed:

• Jeg læser became læser jeg

This happens because Danish main clauses usually follow the verb-second rule. When the subordinate clause comes first, it takes the first position, so the verb of the main clause comes before the subject.

That is a very common Danish pattern.