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The term "web design and development" refers to the entire process of establishing a website. A website's look and feel is determined by web design, while its functionality is determined by web development. Because there isn't usually a clear distinction between the two roles, the terms are frequently interchanged.
SEO stands for Search Engine Optimization, and it is the process of improving a website's technical setup, content relevancy, and link popularity so that its pages are more readily found, more relevant, and more popular in response to user search queries, thereby ranking higher in search engines.
PPC (pay-per-click) is an internet advertising model in which an advertiser pays a publisher (usually a search engine, website owner, or a network of websites) when the ad is clicked.
Digital marketing is a type of marketing that promotes products and services through the use of the internet and online based digital technology such as desktop computers, mobile phones, and other digital media and platforms.