| silo | A type of website structure that involves grouping similar or related content to make it easier for users and search engines to navigate the site. |
| made for advertisements | These types of sites are designed as a venue for advertisements. |
| h4 | a minor, MINOR heading. I would describe it as a whisper in the code. See the explanation below for how H1s, H2s, and H3s look on a page. |
| penguin update | a set of Google algorithm updates and data refreshes that help increase the value of its search results. It was announced in 2012 with the aim of decreasing the number of websites that violate Googles Webmaster Guidelines i.e. websites with poor backlink profiles. |
| crawl friction | Noun phrase. The obstructions: inadvertent or intentional: a Website creates to efficient crawling. Examples include redirects, blocking resources in robots.txt, poor site structure, embedding too many URLs in a page, etc. |
