Acordamos hacer el seguimiento mañana.

Here, acordamos means we agreed.

It is the preterite form of acordar, so it refers to a completed agreement in the past.

• acordar = to agree
• acordamos = we agreed

Be aware that acordamos can also look like the present form (we agree) because -ar verbs have the same nosotros ending in the present and preterite. Context tells you which one is meant. In this sentence, it normally means we agreed.

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

• acordamos already tells you the subject is we
• so nosotros is unnecessary unless you want emphasis or contrast

For example:

• Acordamos hacer el seguimiento mañana. = We agreed to follow up tomorrow.
• Nosotros acordamos hacer el seguimiento mañana. = We agreed to follow up tomorrow.
  This sounds more emphatic, like we agreed, not someone else.

After a conjugated verb like acordamos, Spanish often uses an infinitive to express the second action.

So the structure is:

• acordamos = we agreed
• hacer = to do / to carry out
• el seguimiento = the follow-up

Together:

• Acordamos hacer el seguimiento = We agreed to do the follow-up

This is very similar to English agreed to do.

Seguimiento literally comes from the idea of following something, but in real use it usually means:

• follow-up
• monitoring
• tracking
• checking in on something after an earlier step

In business or professional Spanish, hacer el seguimiento often means:

• to follow up on a task
• to check progress
• to continue monitoring a case, request, or project

So in this sentence, el seguimiento is probably not physical following, but rather the follow-up action.

Spanish often uses a light-verb expression, where a common verb like hacer combines with a noun.

Here:

• hacer el seguimiento = literally to do the follow-up

English also does this sometimes, for example:

• do research
• make a call
• take a look

So even if it feels less direct than English follow up, it is very natural in Spanish.

Hacer el seguimiento is understandable and natural, especially in professional contexts, but another very common Latin American option is:

• dar seguimiento

So you may also hear:

• Acordamos dar seguimiento mañana.

In many parts of Latin America, especially in workplace Spanish, dar seguimiento is extremely common.
Meanwhile:

• hacer seguimiento
• hacer el seguimiento

are also used, depending on the country and context.

A learner should recognize all of them.

In Spanish, abstract or task-like nouns often appear with the definite article.

So el seguimiento does not necessarily mean the follow-up in a super specific English sense. It can simply be the normal Spanish way to refer to that action or process.

Compare:

• hacer seguimiento = to do follow-up / to follow up
• hacer el seguimiento = to do the follow-up

Both can appear, but with many expressions Spanish naturally includes the article.

Yes, mañana can mean either:

• tomorrow
• morning

But in this sentence, it is understood as tomorrow.

Why?

Because Acordamos hacer el seguimiento mañana most naturally means We agreed to do the follow-up tomorrow.

If someone wanted to clearly mean in the morning, Spanish would often say:

• por la mañana = in the morning
• mañana por la mañana = tomorrow morning

So this sentence normally uses mañana as tomorrow.

Yes. Spanish word order is flexible, and mañana can move without changing the basic meaning.

For example:

• Acordamos hacer el seguimiento mañana.
• Mañana acordamos hacer el seguimiento.
• Acordamos mañana hacer el seguimiento.

The first one is the most neutral and natural in many contexts.

Word order changes can affect emphasis:

• Mañana at the beginning highlights the time
• placing it at the end sounds very standard and neutral

Yes, and that can confuse learners.

Acordar has a few meanings depending on how it is used:

• acordar algo = to agree on something
• acordarse de algo = to remember something
• acordarse or acordar in some contexts = to wake up

So in this sentence:

• Acordamos hacer el seguimiento mañana

it clearly means we agreed, because it is followed by an action plan.

If you wanted remember, you would normally see:

• Nos acordamos de... = We remember...

That de is an important clue.

It sounds especially natural in a professional, workplace, or project-management context.

Why?

Because expressions like:

• hacer el seguimiento
• dar seguimiento

are very common in business Spanish, customer service, and administrative communication.

It is not overly formal, but it does sound more professional than casual everyday speech.

In a casual conversation, people might instead say something like:

• Quedamos en revisar eso mañana. = We agreed to look at that tomorrow.
• Mañana le damos seguimiento. = We’ll follow up on it tomorrow.

So the original sentence is natural, especially in work-related Latin American Spanish.

Usually not if you mean follow up in the business or administrative sense.

Seguir means to follow or to continue, but it does not always work as a direct replacement for hacer/dar seguimiento.

• seguir can mean to continue
• dar seguimiento / hacer seguimiento means to follow up on something

So:

• Acordamos hacer el seguimiento mañana = We agreed to do the follow-up tomorrow.
• Acordamos seguir mañana = We agreed to continue tomorrow.

That second sentence changes the meaning. It sounds more like continuing an activity, not necessarily doing a formal follow-up.

Yes. Depending on the context, native speakers might choose alternatives such as:

• Acordamos darle seguimiento mañana.
• Quedamos en darle seguimiento mañana.
• Acordamos revisar eso mañana.
• Quedamos en ver eso mañana.

The differences are small:

• acordamos = we agreed
• quedamos en = we arranged / we agreed to
• darle seguimiento = follow up on it
• revisar eso = review that
• ver eso = look at that

So your original sentence is good, but there are several natural variants depending on how formal or specific you want to sound.