Raggiungiamo la meta domani.

Raggiungiamo is the 1st person plural form of raggiungere, in the present indicative. It means we reach or, depending on context, we are reaching.

So the verb itself already tells you the subject is we.

Italian often drops subject pronouns when they are clear from the verb ending. The ending -iamo already shows that the subject is we.

So:

Raggiungiamo la meta domani.
and
Noi raggiungiamo la meta domani.

both mean the same thing, but noi would usually add emphasis, contrast, or clarity.

In Italian, the present tense is very often used to talk about the future, especially when a time expression makes the future clear.

Because the sentence includes domani, Italian speakers naturally understand it as future:

Raggiungiamo la meta domani. = We’ll reach the goal/destination tomorrow.

This is very common in everyday Italian.

Yes, in some contexts raggiungiamo can also function like let’s reach, because the 1st person plural imperative has the same form here.

But in this sentence, domani and the neutral statement style make it sound much more like a statement than a command or suggestion. So the normal reading is:

We reach / we’ll reach tomorrow, not let’s reach tomorrow.

La meta can mean the goal, the destination, or the finish line, depending on context.

It is a feminine singular noun, which is why it uses la.

Also, be careful not to confuse it with la metà, with an accent, which means the half or halfway point.

• meta = goal/destination
• metà = half

Italian normally uses articles more often than English does. In this sentence, la meta refers to a specific goal or destination, so the definite article la is natural.

English may sometimes translate this more flexibly, for example as:

• the goal
• the destination
• our destination

But in Italian, la meta is the standard structure.

Putting domani at the end is a very natural, neutral word order in Italian.

Italian word order is fairly flexible, so you could also say:

Domani raggiungiamo la meta.

That version puts a little more focus on tomorrow.
The original order simply sounds straightforward and natural.

Yes.

Raggiungere is a transitive verb, so it takes a direct object:

• raggiungere la meta

Arrivare is usually intransitive, so it normally uses a preposition:

• arrivare alla meta

Both can be translated in similar ways, but raggiungere often emphasizes successfully getting to the goal/destination, while arrivare focuses more simply on arriving.

It is pronounced roughly rah-joon-JAH-mo.

A few helpful points:

• ggi sounds like the j in jam
• giun sounds roughly like joon
• the stress falls on -già-

So: rag-giun-già-mo.

It is neutral. Nothing in the sentence is especially formal or especially informal.

It would work in everyday speech, writing, travel contexts, sports contexts, or figurative situations, depending on what la meta refers to.