Ho chiesto a Sara di cliccare sul link mentre io parlavo con la tassista al telefono.

Ho chiesto is the passato prossimo, which is very commonly used in spoken and everyday Italian for a completed action in the past.

Here, the asking is seen as a finished event:
Ho chiesto a Sara... = I asked Sara...

It contrasts nicely with parlavo, which describes an action that was ongoing in the background.

So the tense choice helps show this contrast:

• ho chiesto = completed action
• parlavo = ongoing action at that time

This is a very common Italian pattern.

Because chiedere often works like to ask someone something or to ask someone to do something, and the person being asked is introduced with a.

So:

• chiedere a qualcuno = to ask someone
• chiedere qualcosa a qualcuno = to ask someone for something / ask someone something
• chiedere a qualcuno di fare qualcosa = to ask someone to do something

Here:

• a Sara = to Sara

So Ho chiesto a Sara di cliccare... literally follows the Italian pattern I asked to Sara to click..., even though in natural English we just say I asked Sara to click...

After chiedere a qualcuno, Italian commonly uses di + infinitive to mean to ask someone to do something.

So:

• Ho chiesto a Sara di cliccare sul link = I asked Sara to click the link

This structure is extremely common:

• Ho chiesto a Marco di aiutarmi = I asked Marco to help me
• Ti chiedo di aspettare = I ask you to wait

English learners often want to use a full clause immediately, but Italian very often prefers di + infinitive after verbs like this.

Yes, but it is less neutral and less common in everyday speech for this kind of sentence.

Italian has two main patterns:

• chiedere a qualcuno di + infinitive
• chiedere che + subjunctive

So both are possible in principle:

• Ho chiesto a Sara di cliccare sul link
• Ho chiesto che Sara cliccasse sul link

The first one is the most natural and straightforward here.
The second structure is more formal, heavier, and often used when the sentence is organized differently or when the subject needs special emphasis.

For a learner, chiedere a qualcuno di + infinitive is the safest and most useful pattern.

Yes. Cliccare is a normal modern Italian verb, borrowed from English click and adapted to Italian spelling and conjugation.

So you get forms like:

• cliccare = to click
• clicco = I click
• ha cliccato = he/she clicked

In computer-related language, this is very common.

You may also see fare clic, which is another standard way to say to click:

• cliccare sul link
• fare clic sul link

Both are correct. Cliccare is very natural in everyday usage.

Because su + il normally contracts to sul.

This is the same kind of contraction you see with other prepositions plus articles:

• a + il = al
• di + il = del
• in + il = nel
• su + il = sul

So:

• su il link → sul link

Also, the article il is used because it means the link, not just a link.

Because mentre often introduces an action that was in progress at the same time as another action. For that, Italian usually uses the imperfetto.

So:

• parlavo = I was speaking / I used to speak

Here it means:

• while I was talking

This fits the background action idea perfectly. The sentence presents:

• Ho chiesto... = a completed event
• mentre io parlavo... = the ongoing situation during which that event happened

If you said mentre io ho parlato, it would sound unnatural here, because passato prossimo does not usually express that same ongoing background sense after mentre.

Yes, io is usually optional, because the verb ending already tells you the subject:

• parlavo already means I was talking

So mentre parlavo would also be completely correct.

When io is included, it usually adds one of these effects:

• a bit of emphasis
• contrast
• clarity

Here, mentre io parlavo can sound slightly more explicit, almost like:

• while I was talking...

It is not required, but it is perfectly natural.

This part means with the taxi driver on the phone.

It is built like this:

• parlare con qualcuno = to speak with someone
• al telefono = on the phone / by phone

So:

• parlavo con la tassista al telefono = I was talking with the taxi driver on the phone

Al telefono is very idiomatic in Italian. It literally comes from a + il telefono, which becomes al telefono.

You can also find similar word orders, for example:

• parlavo al telefono con la tassista

That would also be correct. Italian allows some flexibility here.

Exactly. Tassista is one of those Italian nouns that can refer to either a man or a woman; the article tells you the gender.

So:

• il tassista = the male taxi driver
• la tassista = the female taxi driver

That is why this sentence uses la tassista: it tells you the driver is female.

This is a useful pattern to remember with many -ista nouns:

• il turista / la turista
• il pianista / la pianista
• il giornalista / la giornalista

Because Italian normally uses the fixed expression al telefono to mean on the phone or by phone.

So you say:

• Sono al telefono = I’m on the phone
• Parlo al telefono = I talk on the phone
• Ero al telefono con lei = I was on the phone with her

Using just telefono by itself would not sound right in this context. Italian needs the preposition + article here.

The given order is natural, but Italian word order is more flexible than English word order.

This sentence:

• Ho chiesto a Sara di cliccare sul link mentre io parlavo con la tassista al telefono.

could also be rearranged in ways that are still correct, for example:

• Mentre io parlavo con la tassista al telefono, ho chiesto a Sara di cliccare sul link.
• Ho chiesto a Sara, mentre parlavo con la tassista al telefono, di cliccare sul link.

The first version is probably the most natural alternative.
The original sentence is clear and idiomatic, especially in everyday narrative Italian.