The magical word "かわいい" has changed some stereotypes. 

The adjective is sometimes used to describe deserved desired women.

Some men use it to describe immature or less smart intelligent women in a positive way.

The magical word かわいい has changed some stereotypes.（かわいいって主語なんですから、Theの方がいいと思います。）

In Japan, かわいい is frequently used in various situations.（Variousで「かわいいって日本人はよく使う言葉です」という意味が分かるので、Frequentlyって要らないと思います。）

Actually, the word is so ambiguous that I cannot clearly define it.（Ambiguousってすごいなぁ！よく使いました！）

Culturally, being かわいい has been an important element way for women to attract men in Japan.

It represents not only appearance, but also character.

The adjective is sometimes used to describe deserved women.（Deservedってどの意味ですか。あまり分かりません。Dependentじゃないでしょうか。）

Some men use it to describe immature or less smart ditsy women in a positive way.

I think this is because men still tend to prefer women who want to depend on men are dependent or and often need men's a man's help. although Despite this, more men like independent and smart intelligent women than before, and then are therefore willing to have a give-and-take or fifty-fifty relationship with these such women.（こんな間違えは本当に小さいです！IntelligentってSmartよりこういう作文に良い言葉だと思います。

By People taking advantage of it the term, new words by using that incorporated かわいい were coined, such as エロかわいいand 大人かわいい. These were successfully used especially in the fashion business to introduce new concepts to that fascinated women.

Here, with the In Japan, as a result of economic development, people have become developed a flexible attitude toward life and seemingly accept various lifestyles.

However, since the society and people sometimes sticks with conventional ideas and stereotypes, some people feel uncomfortable and have to struggle with them.

Under these circumstances, these such new words seem to help you people be free from some conventional ideas.

As a matter of fact, the popularity of them such words has changed some stereotypes.

I'll talk about popular, new words by using かわいい-- エロかわいい and 大人かわいい-- in my next entry.

The adjective is sometimes used to describe deserved women. "deserved women" doesn't make sense. Maybe "The adjective is sometimes used appropriately, to describe women who are (cute) or (whatever...)"

By taking advantage of it, new words by using かわいい, such as エロかわいいand 大人かわいい, were coined and successfully used to introduce new concepts to fascinate women, especially in the fashion business.

Here, with the economic development, people have gained a flexible attitude toward life and seemingly accept various lifestyles. "the economic development" is not quite specific enough -- perhaps "with Japan's economic success".

However, since the society and people sometimes stick with conventional ideas and stereotypes, some people feel uncomfortable and have to struggle with them. "have to" is grammatical and okay, but it's a little more wordy than necessary. And "them" is a little ambigous, because you have a number of nouns -- society, people, ideas and stereotypes. it's okay, but it would be better if the sentence were re-worded without the indefinite pronoun.

Under these circumstances, new words like かわいい or エロかわいい help free from conventional norms. Your sentence is good, but mentioning the specific words instead of using an indefinite pronoun is better (as long as you don't over-repeat the specific words, which I don't think you have). Taking out the qualifiers like "seem" and "some" makes the sentence more direct, which is usually good.

As a matter of fact, their popularity has changed some stereotypes.

Culturally, being かわいい has been an important element for women in attracting men in Japan.

The adjective is sometimes used to describe desirable women. (?)

By Taking advantage of the popularity of the word かわいい, new words by using かわいい, such as エロかわいいand 大人かわいい have been coined and used successfully, especially in the fashion world, to introduce new concepts that appeal to women.