谷歌插件，提供关键词SEM各种指标。Keywords Everywhere is a browser add-on for Chrome & Firefox that shows search volume, CPC & competition on multiple websites.
强大的网站流量分析工具 。Website Traffic Analysis & Competitive Intelligence | SimilarWeb
分析竞争对手的网站 SEM 和 SEO分析。Semrush offers solutions for SEO, PPC, content, social media and competitive research. Trusted by over 7000000 marketers worldwide
强大的SEO工具，可以分析关键词和外链等。t have to be an SEO pro to rank higher and get more traffic. Join Ahrefs – we're a powerful but easy to learn SEO toolset with a passionate community.
SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.