| open source | Software that comes packaged with its source code so programmers can modify and change it as needed. |
| hero section | An area at the top of a webpage often consisting of strong visuals with simple typography and user interface elements. Most of the elements rest on top of a background image and can be often animated. All designed to provide a vibrant and stimulating introduction to the page. |
| crawl spam | Noun phrase. High volume traffic that provides no value to the Website. Common sources of crawl spam include browsers set to prefetch large numbers of documents, email scraper programs, illegal crawlers used to scrape Websites for content, social media monitoring crawlers, and search engines that send little to no traffic to the sites being crawled. SEO practitioners doing link research drive a significant portion of Crawl Spam. Crawl Spam cannot be controlled through robots directives; this is rogue crawling traffic. |
| compression | Data compression is used to reduce the bit size of files, without necessarily affecting its quality. Its useful on the web, as the lower a file is in size, the faster it will download. For example, a CSS file could contain attributes of a HTML class written separately, like this: .class {font-size:12px;} .class {font-color:red;}. A compressed version would look like this .class {font-size:12px; font color:red;}. Images can also be compressed. This process is referred to as Image Optimization. |
| on-page optimization | This is a key term that refers to what things you can do on your page and or through coding that will help your website gain positive ranking in Search Engines. |
