Learn Hardcore Korean: inteoneseseo harin panmaereul jaju haeyo.

인터넷에서 literally means “at/on the Internet.”
The particle 에서 marks the place where an action occurs.
에 indicates a location of existence or destination, but since we’re talking about where the sale happens, we use 에서.

What is 할인 판매, and how do its components 할인 and 판매 work together?

할인 means “discount,” and 판매 means “sale” or “selling.”
Together they form the compound noun 할인 판매, literally “discount sale,” referring to a sale event offering discounts.

Why is 판매 followed by 를 in 할인 판매를 자주 해요?

를 is the direct object marker in Korean.
Since 판매(를) is what we are “doing” (the action), it takes 를 before the verb 하다/해요.

Why do we use 하다 (or 해요) with 판매, rather than just using 팔다?

판매하다 (판매를 하다) is a more formal or business-like way to say “to sell” or “to conduct a sale.”
팔다 simply means “to sell (goods)” in a general sense.
When you want to emphasize organizing or running a sale event (especially a discount campaign), 할인 판매를 하다 is preferred.

What does 자주 해요 mean, and why is 자주 placed before 해요?

자주 is an adverb meaning “often.”
In Korean, adverbs typically come before the verb they modify, so 자주 goes right before 해요 to show frequency.

Can I omit 를 and say 인터넷에서 자주 할인 판매해요?

In casual spoken Korean, some speakers might drop 를, but grammatically, 판매를 하다 requires the object marker 를.
Omitting it can sound incomplete or ungrammatical, so it’s better to keep 할인 판매를 해요.

Can I replace 자주 with 많이, as in 인터넷에서 많이 할인 판매를 해요?

많이 means “a lot” and can modify verbs for quantity or degree.
자주 focuses strictly on frequency (“often”), while 많이 해요 could imply “do a lot [of sales]” or “sell a lot,” which shifts the meaning.

What’s the difference between 할인 판매 and 세일?

세일 is a Korean English loanword (Konglish) for “sale,” used casually.
할인 판매 is pure Korean (using 할인
- 판매) and sounds more formal or official, often used in written or business contexts.