How to create queries, how to optimize them. What is DDL or DSL. Creating database schemas for best performance.
Do you want to make some money on the interent ? Or maybe do you want to advertise your own business online ? Either way studying how to use Google Ads and Google Adwords is for you. Master the Google way of publishing.
Chrome Extension are in the rise. Learn how to extend the Chrome Browser with extra information, data and way to manipulate webpage. Learn how to publish your Chrome Extension and let other use it.
Firefox browser is here to stay. Although fighting against Google Chrome / Chromium and Edge is a difficult task, it is still the best broswer in the world. Firefox allows diversity which no other browser enables. Learn how to create Firefox extension, the old way and the new way, using the MDN. Firefox extensions can create a whole new look and feel to the browser and transform it to something totally different. Firefox ectension development will teach you how to create new extension for Firefox using the XUL, JasvsScript, HTML5 and CSS.