What does SEM SEO CPC SNS EDM do in the network promotion department? Which is better? Need professional knowledge?

SEM SEM is the abbreviation of search engine marketing, which means search engine marketing in Chinese. SEM is a new form of network marketing. What SEM does is to comprehensively and effectively use search engines for online marketing and promotion. SEM pursues the highest cost performance, gets the most visits from search engines with the least investment, and generates commercial value. SEO SEO (search engine optimization), translated into Chinese is search engine optimization, which is a popular online marketing method in recent years. Its main purpose is to increase the exposure of specific keywords, so as to improve the popularity of the website and thus increase sales opportunities. There are two kinds of SEO: off-site SEO and on-site SEO. The main work of SEO is to understand how various search engines grab Internet pages, how to index them, and how to determine their ranking of search results for a specific keyword, so as to optimize web pages and improve the ranking of search engines, thereby increasing the number of visitors to the website and ultimately improving the sales or publicity ability of the website. CPC (cost per click; Cost per click, that is, the cost per click of online advertising. It is an important reference data for the effect of online advertising. CPC is a common pricing form in online advertising. For example, keyword advertising and other forms of advertising that pay by effect generally adopt this pricing model. Snsnsns, the full name of social networking service, namely social networking service, refers to the internet application service aimed at helping people build social networking sites. It also refers to the existing mature and popular information carriers in society, such as short message service. Another common explanation of SNS: the full name of social networking site, namely "social networking site" or "social network". EDM EDM is the abbreviation of Email Direct Marketing, that is, email marketing. EDM is the abbreviation of its English initials. Speaking of EDM marketing, there must be EDM software to send EDM content. Enterprises can use EDM software to send EDM emails to target customers, establish communication channels with target customers, and directly convey relevant information to them to promote sales. EDM software has many uses, which can send electronic advertisements, product information, sales information, market research, marketing information and so on. After reading the above introduction, you will definitely think that this requires professional knowledge. Which is better? It seems that some can't be compared, depending on the specific problem you are aiming at. Of course, if you mean to bring greater results to your marketing activities or promotion activities, I think it is sem, and seo is included in sem at this time.