The differences between AliExpress long-tail words and keywords are mainly reflected in the following aspects:

1. Word length: Keywords are usually one or two words, while long-tail words are composed of multiple words, sometimes even sentences. Long-tail words are usually more specific and descriptive, and can more accurately reflect user needs.

2. Search volume: Keywords have a large search volume, but long-tail words have a relatively small search volume. Because long-tail words are more specific, they will perform better in certain scenarios.

3. Competition: Keywords are usually more competitive because they have a large search volume, while long-tail words are relatively less competitive. This means that companies are more likely to get higher rankings and traffic through long-tail words.

4. User intent: Keywords often reflect the broader needs of users, while long-tail words can better reflect the specific and clear needs of users. Therefore, long-tail words often bring higher conversion rates.

5. Variability: Keywords are relatively stable, while long-tail keywords need to be adjusted frequently as the market, seasons, user needs and other factors change.

In general, keywords and long-tail keywords play an important role in AliExpress marketing. Keywords can help companies expand their visibility and attract a large amount of traffic, while long-tail keywords can help companies accurately locate target users and increase conversion rates. Companies should combine their own products and market conditions to reasonably use keywords and long-tail keywords to achieve the best marketing results.