求翻译：目前市面上的内容搜索和广告搜索优化引擎有上百个，这些优化引擎作用极大。搜索结果越好，吸引回头客的几率就越高，进而有助于提升用户点击广告的可能性。有时候，诸如提高广告可阅读性这类简单的办法很管用。但也可以开发软件来更好地吸引大量中小企业，无论是在美国还是海外，中小企业仍然是经济活动的主力。是什么意思？

Currently available content search and advertising on search engines there are hundreds, these optimization engine great. The better the search results, the higher the chances to attract repeat customers, and thus help to enhance the likelihood of users click on ads. Sometimes, such as improvement of advertising can be read by this simple approach worked well. But you can also develop software to better attract a large number of small and medium enterprises, both in the United States is also overseas, SMEs are still the main economic activities.