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.
强大的网站流量分析工具 。Website Traffic Analysis & Competitive Intelligence | SimilarWeb
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.
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
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.