Search Engine Optimization (SEO) is to increase your website visibility over internet via natural i.e oragnic search results.
Search Engine Marketing (SEM) is a form of Internet Marketing that involves the promotion of websites by increasing their search engine page results through paid placement.
Google Adwords is Google advertising program and main source of revenue. Adwords offer pay per click advertising.
Web Designing is a broad term covering many skills that are used in web pages maintenance.
Logo Designing is an online graphic design service that focuses on logo design. A recognized logo can be the difference for your company.