6) 按点击付费的搜索引擎。搜索引擎也需要赢利,随着互联网商务的越来越成熟,收费的搜索引擎也开始大行其道。最典型的有Overture和百度,当然也包括Google的广告项目 Google Adwords。越来越多的人通过搜索引擎的点击广告来定位商业网站,这里面也大有优化和排名的学问,你得学会用最少的广告投入获得最多的点击。
搜索引擎,对页面各个元素的权重比例Inbound link text: 10 points.
Title: 10 points.
Domain name: 7 points.
Large h1-h2 headings: 5 points.
First sentence of first paragraph: 5 points.
Path or filename: 4 points.
Proximity (multi kws): 4 points.
Beginning of a sentence 1.5 points.
Bold or italic text: 1 point.
Usage in text: 1 point.
Title attribute: 1 point.
Alt tag: .5 point.
Meta descrip: .5 point.
Meta keywords: .05 point.