How many ways are there to maintain conversion rates without lowering product prices? What is your advertising structure like?

Preface

Since there is no sun this week, everyone should rest at home. I'm going to post this and ask for your opinions.

What are some ways to maintain conversion rates without lowering product prices?

What is your advertising structure like?

My idea is: sort out a few core keywords before listing (home category: core keywords ABA ranking within 1000, which is a red ocean)

When new products are put on the shelves, we open the core keywords, and then cooperate with the free review form + the review form (the evaluation resource is the company's private domain traffic, which is relatively safe), and rush to the top five positions on the homepage in about a month. Of course, the reviews will reach about 100 in this month. When there are 10 reviews, automatic advertising will be turned on. However, after the core keywords rush to the top, it is found that it falls again in a few days. We are engaged in household products. I found that 3C products did not fall so quickly, but it is very difficult to get up.

So now I have a few questions

1: One method I can think of is to use a low-price spiral to stabilize the conversion rate and thus stabilize the ranking of core keywords. However, the disadvantage is that it will disrupt market pricing, lower the profits of the entire category, and give benefits to the Americans.

So how do you guys stabilize your core keywords? Did I make a mistake in the first step? Should I promote long-tail keywords first and then core keywords? (Do long-tail keywords have to be the root of core keywords?)

If you need to promote long-tail keywords first and then core keywords to stabilize the ranking of core keywords, then what is your advertising structure like?

Is it necessary to promote long-tail keywords together with core keywords during the new product period?