apeuro i haengsa-e jaju olgeyo.

Here, 앞으로 means from now on / in the future, not physical movement forward.

So in this sentence, it sets a future time frame:

앞으로 이 행사에 자주 올게요.
= From now on, I’ll come to this event often.

In other contexts, 앞으로 can mean forward/ahead, but not here.

-에 marks the place or destination that someone goes to or comes to.

With movement-related verbs like 가다 (to go) and 오다 (to come), -에 is very common:

• 학교에 가요 = I go to school
• 집에 와요 = I come home
• 행사에 오다 = to come to an event

So 이 행사에 means to this event.

Korean chooses between 오다 (come) and 가다 (go) based on perspective, just like English, but sometimes a little differently.

In 이 행사에 자주 올게요, the speaker is talking about coming to the event, often from the perspective of the listener or the event itself. If the speaker is talking to someone connected to the event, 오다 feels natural: I’ll come.

If you used 갈게요, it would sound more like I’ll go there, from the speaker’s own current location/perspective.

So 올게요 is natural if the speaker is addressing someone at the event or someone involved with it.

올게요 is made from:

• 오다 = to come
• -ㄹ게요 / -을게요 = I’ll ... with a nuance of intention, willingness, or promise to the listener

Since the verb stem is 오-, it becomes:

오 + ㄹ게요 → 올게요

So 올게요 means something like:

• I’ll come
• I’ll make sure to come
• I intend to come

It often sounds a little more personal than a plain future statement.

This is a very common question.

• 올게요 = I’ll come
  
  • often sounds like a decision, intention, or promise
  • often connected to the listener
• 올 거예요 = I will come / I’m going to come
  
  • more neutral future statement
  • can sound more like a plan or prediction

So:

• 앞으로 이 행사에 자주 올게요
  = From now on, I’ll come to this event often
  → sounds like the speaker is telling the listener their intention

• 앞으로 이 행사에 자주 올 거예요
  = I’ll probably/plan to come to this event often in the future
  → more neutral

자주 means often / frequently.

It usually goes before the verb it modifies, so 자주 올게요 means I’ll come often.

Korean adverbs are often placed before the verb, and that is exactly what is happening here:

• 자주 오다 = to come often
• 자주 갈게요 = I’ll go often
• 자주 만나요 = we meet often

So the placement is normal and natural.

Korean often leaves out the subject when it is obvious from context.

So even though English needs I, Korean does not have to say 저는 here.

The full version could be:

저는 앞으로 이 행사에 자주 올게요.

But in normal conversation, dropping 저는 is very natural if everyone already knows who is speaking.

It is natural if the event is recurring or if the context makes repeated attendance possible.

For example, it works well if:

• the event happens regularly
• the speaker means a type of event
• the speaker is talking about coming to similar sessions in the same event series

But if this event is a one-time event, 자주 can sound a little odd, because you cannot come to one single one-time event often.

In that case, something like these might be more natural depending on context:

• 앞으로 이런 행사에 자주 올게요.
  = I’ll come to events like this often from now on.
• 앞으로 이 행사장에 자주 올게요.
  = I’ll come to this event venue often from now on.

So the original sentence is fine, but the context matters.

올게요 is in the polite -요 style, which is common in everyday conversation.

It sounds:

• polite
• friendly
• natural in many normal situations

It is less formal than 오겠습니다, which would sound more formal or official.

So 앞으로 이 행사에 자주 올게요 is a good everyday polite sentence.

Yes, Korean word order is somewhat flexible, especially with adverbs and time expressions, as long as the particles make the roles clear.

For example, these are all possible:

• 앞으로 이 행사에 자주 올게요.
• 이 행사에 앞으로 자주 올게요.
• 앞으로 자주 이 행사에 올게요.

However, the original sentence sounds very natural and easy to understand. A common pattern is:

time expression + place + adverb + verb

So:

앞으로 + 이 행사에 + 자주 + 올게요

is a very standard and clear order.