qǐng jīhuó tā.

Yes—here 请 is being used to make the sentence polite, much like please in English.

So:

• 请激活它。 = Please activate it.

A useful thing to know is that 请 can also be a full verb in other contexts, meaning to invite or to request. But in this sentence, it is simply a politeness marker placed before the verb phrase.

Examples:

• 请坐。 = Please sit.
• 请看这里。 = Please look here.

Mandarin word order here follows the basic pattern:

• 请 + verb + object

So:

• 请 = please
• 激活 = activate
• 它 = it

That gives:

• 请激活它。 = Please activate it.

If you said 请它激活, that would suggest please let it activate... or ask it to activate..., which is a very different structure. In the original sentence, 它 is the thing being activated, so it comes after the verb as the object.

激活 is a two-character verb meaning to activate.

Even though it has two characters:

• 激
• 活

you should usually learn and use it as one vocabulary item: 激活.

This is very common in Mandarin. Many verbs are made of two characters and function as a single word.

Examples of similar two-character verbs:

• 打开 = open
• 关闭 = close
• 启动 = start / launch
• 激活 = activate

So in this sentence, 激活 is the main verb.

它 means it and is used for things, objects, animals, software, devices, accounts, and other non-human referents.

Compare:

• 他 = he
• 她 = she
• 它 = it

In speech, all three are pronounced tā, so the difference is only visible in writing.

In your sentence, 它 refers to some non-human thing, such as:

• a device
• a phone
• an account
• a card
• a feature
• a program

So 请激活它。 means Please activate it.

Sometimes yes, if the object is already very clear from context.

For example, if everyone knows you are talking about a specific account or device, you might hear:

• 请激活。

This can mean Please activate it or Please activate this, depending on context.

However, including 它 makes the sentence clearer and more complete when you want to explicitly say it.

So:

• 请激活它。 = clearer, explicitly mentions it
• 请激活。 = acceptable in context, but less explicit

Yes, especially in instructions, customer service, tech support, apps, websites, and formal written language.

Because 激活 is a technical or functional verb, the sentence sounds especially natural in contexts like:

• activating a phone
• activating a SIM card
• activating an account
• activating software
• activating a feature

In casual everyday conversation, people might sometimes say something slightly different depending on the object, but 请激活它。 is perfectly natural when the situation is technical or instructional.

The pinyin is:

• 请 — qǐng
• 激活 — jīhuó
• 它 — tā

Tone pattern:

• qǐng = 3rd tone
• jī = 1st tone
• huó = 2nd tone
• tā = 1st tone

A natural rhythm is:

• qǐng | jīhuó tā

A couple of pronunciation tips:

• q in qǐng is like a light ch sound said with the tongue further forward.
• jī is not like English jee exactly; it is made with the tongue close to the front palate.
• huó should glide smoothly; don’t over-separate the two syllables in 激活.

Yes, 请把它激活 is also grammatical.

Compare:

• 请激活它。
• 请把它激活。

Both mean Please activate it.

The version with 把 puts extra focus on what happens to the object:

• 把 + object + verb

So:

• 请把它激活。 feels a little more like Please take it and activate it / Please get it activated.

In many cases, especially with a straightforward verb like 激活, the simpler 请激活它。 is perfectly natural and often more direct.

Yes, you can say:

• 请激活一下它。
• more naturally: 请帮我激活一下它。 in some contexts
• or often simply: 请激活一下。

一下 softens the action and can make the request sound a bit lighter or less abrupt, somewhat like for a moment or just a gentle softener in English.

However, with technical instructions or formal prompts, 请激活它。 is often cleaner and more standard.

So:

• 请激活它。 = direct, polite
• 请激活一下。 = slightly softer, more conversational

It is grammatically an imperative sentence, but because it begins with 请, it functions as a polite request.

So it is not a harsh command like:

• 激活它！ = Activate it!

Instead:

• 请激活它。 = Please activate it.

In Chinese, adding 请 is one of the most common ways to turn an imperative into a polite request.