Если страница не загружается, попробуй обновить её.

Если means if. It introduces a condition:

• Если страница не загружается = If the page isn’t loading
• попробуй обновить её = try refreshing it

This is a very common Russian pattern: Если X, (то) Y = If X, then Y.
In everyday speech, то is often omitted, as it is here.

Russian normally puts a comma between the if-clause and the main clause:

• Если страница не загружается, попробуй обновить её.

This is required by standard Russian punctuation.
Even though English sometimes feels lighter with commas, in Russian this comma is expected.

Страница means page. It is a feminine noun, which you can tell from the -а ending in its dictionary form.

Here it is in the nominative singular, because it is the subject of the verb:

• страница не загружается = the page is not loading

Because страница is feminine, later the pronoun referring back to it is also feminine: её = it / her.

Не загружается is the natural way to say isn’t loading.

Breakdown:

• загружаться / загрузиться = to load
• загружается = is loading / loads
• не загружается = is not loading

This form is 3rd person singular present, matching страница.

Why this form?

1. загружаться is the usual verb for something like a page, file, or app loading.
2. The -ся form often gives the sense that the thing itself is undergoing the action:
   страница загружается = the page is loading
3. не загрузится would be future: won’t load
4. не грузит would usually mean doesn’t load something or sound wrong in this context

So не загружается is the standard choice for an ongoing problem.

The ending -ся often appears in verbs that are reflexive or have a passive-like meaning.

In this sentence:

• загружать = to load something
• загружаться = to load / be loading

Compare:

• Браузер загружает страницу = The browser loads the page
• Страница загружается = The page is loading

So here -ся helps make the page the grammatical subject, similar to English the page is loading rather than something loads the page.

Попробуй is the imperative form of попробовать, meaning try.

So:

• попробуй обновить её = try refreshing it

This is a singular informal command, used when speaking to one person in the ты form.

It sounds like a normal instruction or suggestion, especially in troubleshooting or tech support.

These verbs are related but not used the same way.

• попробуй = try (do it once / give it a go)
• пытайся = keep trying / make an effort

In this sentence, the meaning is:

• Try refreshing it
  not
• Keep attempting to refresh it

So попробуй is the natural choice because it suggests one practical step to test.

This is about aspect.

• обновлять = imperfective
• обновить = perfective

After попробуй, Russian often uses the perfective infinitive when talking about a single complete action:

• попробуй обновить её = try to refresh it / try refreshing it

The idea is: do one complete refresh.

If you used обновлять, it would sound more like an ongoing process or repeated action, which is not what is meant here.

Russian often uses обновить literally meaning renew / update / refresh in computer contexts.

So:

• обновить страницу can mean refresh the page
• depending on context, it can also mean update something

In this sentence, because we are talking about a page not loading, обновить её clearly means refresh it.

A very common phrase is:

• обновить страницу = refresh the page

Её means it here, referring back to страница.

Because обновить takes a direct object, the pronoun is in the accusative case.

For feminine nouns/pronouns, the accusative often looks like the genitive:

• страница → её
• обновить её = refresh it

Even though её can also mean her, here it clearly means it, because it refers to the page.

Yes, sometimes Russian can omit the object if it is obvious from context.

So in conversation, you might hear:

• Если страница не загружается, попробуй обновить.

But попробуй обновить её is completely natural too, and it makes the reference explicit.
In learner terms:

• with её = clearer, more explicit
• without it = more conversational if the object is obvious

Попробуй is the informal singular imperative, used when speaking to one person casually.

If you wanted the polite or plural form, you would say:

• Если страница не загружается, попробуйте обновить её.

So:

• попробуй = informal singular
• попробуйте = polite singular or plural

This is exactly like many instruction-style sentences in Russian: the choice depends on how formally you are addressing the person.

The structure is:

• Если
  • present-tense condition
• comma
• imperative instruction

So literally:

• Если страница не загружается, попробуй обновить её.
• If the page is not loading, try to refresh it.

You can think of it as:

1. situation/problem: страница не загружается
2. recommended action: попробуй обновить её

This is a very common Russian pattern for advice, instructions, and troubleshooting.