Reviso el número de seguimiento antes de despachar.

Reviso is the first-person singular present tense form of revisar.

• revisar = to check, review, inspect
• reviso = I check / I review / I inspect

So the speaker is talking about a habitual action or a present action from the I perspective.

In Spanish, subject pronouns are often omitted because the verb ending already shows who is doing the action.

• reviso already means I check
• So yo reviso is possible, but usually unnecessary

You would add yo only for emphasis, contrast, or clarity, for example:

• Yo reviso el número de seguimiento, no tú.
  = I check the tracking number, not you.

This is a very common Spanish structure: noun + de + noun.

Here:

• número = number
• seguimiento = tracking, follow-up
• número de seguimiento = tracking number

So de links the two nouns, similar to how English uses a noun before another noun.

Spanish often prefers this pattern where English uses a compound noun:

• tarjeta de crédito = credit card
• centro de salud = health center
• número de seguimiento = tracking number

Yes, número de seguimiento is very common and widely understood.

Depending on the country or company, you may also see:

• número de rastreo
• código de seguimiento
• guía or número de guía in shipping contexts

But número de seguimiento is standard and natural in many places.

Because after antes de, Spanish normally uses an infinitive when the subject stays the same or when the action is being expressed generally.

So:

• antes de + infinitive
• antes de despachar = before dispatching / before shipping / before sending out

Other examples:

• antes de salir = before leaving
• antes de pagar = before paying
• antes de imprimir = before printing

This is one of the most useful patterns to memorize.

In this sentence, despachar most likely means something like:

• to ship
• to send out
• to dispatch
• to process for delivery

In Latin American business, warehouse, or shipping contexts, despachar often refers to sending goods out or releasing an order for shipment.

Important: despachar can also have other meanings depending on context, such as:

• to attend a customer
• to deal with a matter quickly
• to dispatch in a more general sense

Here, the shipping/logistics meaning is the most likely one.

Spanish often leaves out an object if it is obvious from context.

So antes de despachar can mean:

• before shipping it
• before sending the package/order
• before dispatching the item

If everyone already knows what is being shipped, Spanish does not need to repeat it.

A fuller version might be:

• Reviso el número de seguimiento antes de despachar el paquete.

But the shorter version sounds perfectly natural if the object is understood.

Spanish uses definite articles more often than English.

Here, el número de seguimiento suggests a specific tracking number, probably the one connected to the order or shipment being discussed.

Compare:

• Reviso el número de seguimiento = I check the tracking number
• Reviso un número de seguimiento = I check a tracking number

If the context already identifies which number it is, el is the natural choice.

Seguimiento is a noun.

It comes from the idea of seguir = to follow, but seguimiento means:

• tracking
• follow-up
• monitoring

So in número de seguimiento, it functions as a noun describing the kind of number it is.

Yes.

• Use antes de + infinitive when there is no need for a new conjugated clause:

  • antes de despachar
  • antes de salir

• Use antes de que + subjunctive when a new clause follows:

  • antes de que despaches
  • antes de que salga el paquete

For example:

• Reviso el número de seguimiento antes de despachar.
  = I check the tracking number before shipping.

• Reviso el número de seguimiento antes de que despachen el paquete.
  = I check the tracking number before they ship the package.

That distinction is very important in Spanish.

It can be either, because the Spanish present tense often covers both ideas.

Reviso can mean:

• I check the tracking number before shipping.
  (habit/routine)

or, depending on context:

• I’m checking the tracking number before shipping.
  (current action)

Spanish present tense is often broader than English present simple, so context tells you which meaning is intended.