Search:

SEO-friendly urls are the url that is according to the rules of search engines such as hyphens are used to separate the words, keywords are added in urls, properly hyperlinked, shorter url.

Anchor text is important for SEO because it uses keywords in it and hyperlinked to another website or web page.

Basic SEO techniques for beginners are:

On Page SEO:
keyword research
sitemap.xml
robots.xml
meta, title, alt, h1 tags
internal link,
content writing
responsive website etc.

SEO Audit means the analysis and evaluation of your website's SEO campaign. It includes the keyword ranking of a web page / website, flow of website traffic, how to improve SEO campaign etc.

Forum isignatures are good for SEO purpose too as it helps in generating website traffic and improvement in website rank.

To improve SEO of a website, the tools to be used are:

Google Analytics
Google Webmaster tool
Google Keyword Planner
Copyscape
SEMRush
ahrefs
Small SEO tools
Backlink watch

The SEO ranking signals are:

Website page speed
Sitemap.xml
Optimized content
High quality backlinks
Domain age

The SEO goals are to be set are to increase the website traffic, more brand awareness and visibility, more sales and revenues, more improvement in website rank.

Apart from WordPress, Weebly and Joomla are good.