Online advertising, also called online marketing, Internet advertising or web advertising, is a form of marketing and advertising which uses the Internet to deliver promotional marketing messages to consumers.This type of marketing includes email marketing, search engine marketing (SEM), social media marketing, many types of display advertising (including web banner advertising), and mobile advertising.
Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs). Search engine optimization (SEO) is big part of search engine marketing. It is the practice of increasing the quantity and quality of traffic to your website through organic search engine results. Search engines like Google, Yahoo! or any other have a crawler that goes out and gathers information about all the content they can find on the Internet. All results then go through an algorithm that tries to match the best possible ones to the inputted query. There are a lot of factors that affect ranking of the results such as, domain-level, link authority features, page-level link features, page-level keyword and content features, user, usage and traffic or query data, social metrics and many more. Optimization of a website can be in different forms, from doing keyword research to working on HTML, title tags and meta description. On the internet there are a lot of free SEO courses that give insight into SEO and explain the basics, but also there are companies that provide SEO services. These courses are provided by reputable SEO companies or big educational websites.
SEO can be divided onto on-site SEO and off-site SEO. On-site or on-page SEO is the practice of optimizing elements on a website so it ranks higher in search engine results. It incorporates optimization of both the content on the website and its complete HTML source code. When doing on-site SEO, goal is to make it as easy as possible for both search engines and users to identify that page as relevant to a search query, find that page useful and worthy of ranking well on a search engine results page (SERP) and fully understand what a webpage is about. Keywords and keyword services play the biggest role in on-page SEO. On the other side off-site SEO represents actions done outside of website which also affect ranking within search engine results pages (SERPs).
Usually, this optimization includes improving search engine and user perception of a site's popularity, relevance, trustworthiness, and authority. This is done by linking or promoting the website. For example, websites trustworthiness improves by getting links from other sites that are quite reputable and trustworthy. Another part of off-site SEO is social media marketing, influencer marketing and guest blogging. There are quite a few ways to link and types of links, so it is important to understand them and their roles. A lot of SEO courses deal actually put this together with keyword research as main focuses of course itself.