Publicidade em linha

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Publicidade em linha[6], also known as digital advertising[7], is a modern marketing strategy[4] que utiliza o internet[9] to deliver promotional content to consumers. It originated around the mid-1990s and has since undergone significant evolution, notably shifting from early restrictions on commercial activities on networks like ARPANET and NSFNet. Online advertising includes various formats such as floating ads, expanding ads, trick banners, and news feed ads. It utilizes advanced tecnologia[8] like programmatic advertising and data management platforms to automate ad sale and delivery, improve targeting, and enhance efficiency. Key strategies under online advertising include Search Engine Marketing[2] (SEM), Otimização para motores de busca[1] (SEO), sponsored search, social media marketing[3]e mobile advertising[5]. These strategies aim to increase sítio Web[10] visibility, improve relevance to search terms, and deliver ad content across different platforms and devices.

Definições de termos
1. Otimização de motores de busca ( Otimização para motores de busca ) A otimização dos motores de busca, normalmente designada por SEO, é uma estratégia de marketing digital fundamental. Com origem em meados dos anos 90, a SEO consiste em melhorar os sítios Web para obter classificações mais elevadas nas páginas de resultados dos motores de busca. Este processo é essencial para aumentar o tráfego na Web e converter visitantes em clientes. A SEO utiliza várias técnicas, incluindo a conceção de páginas, a otimização de palavras-chave e a atualização de conteúdos, para melhorar a visibilidade de um sítio Web. Envolve também a utilização de ferramentas para monitorizar e adaptar-se às actualizações dos motores de busca. As práticas de SEO variam entre os métodos éticos de "chapéu branco" e as técnicas reprovadas de "chapéu preto", sendo que o "chapéu cinzento" se situa entre ambos. Embora a SEO não seja adequada para todos os sítios Web, a sua eficácia nas campanhas de marketing na Internet não pode ser subestimada. As tendências recentes do sector, como a utilização da Web móvel que ultrapassa a utilização do computador, realçam a paisagem em evolução da SEO.
2. Marketing para motores de busca ( Search Engine Marketing ) Search Engine Marketing (SEM) refers to the practice of marketing a business using paid advertisements that appear on search engine results pages. These advertisements are often driven by bids on keywords that users of services such as Google and Bing might enter when looking for certain products or services. SEM offers advertisers the opportunity to put their ads in front of motivated customers who are ready to make a purchase. The evolution of SEM has integrated a range of strategies, such as search engine optimization (SEO), paid listings management, and online marketing strategies like pay-per-click (PPC) programs. The technique is crucial in today's digital era, aiding various industries in attracting consumers and increasing opportunities. Despite challenges such as competition and evolving search algorithms, SEM continues to be a vital tool for online visibility and business growth.

Publicidade em linha, also known as online marketing, Internet advertising, digital advertising ou web advertising, is a form of marketing and advertising that uses the Internet to promote products and services to audiences and platform users. Online advertising includes email marketing, search engine marketing (SEM), social media marketing, many types of display advertising (including web banner advertising), and mobile advertising. Advertisements are increasingly being delivered via automated software systems operating across multiple websites, media services and platforms, known as programmatic advertising.

Like other advertising media, online advertising frequently involves a publisher, who integrates advertisements into its online content, and an advertiser, who provides the advertisements to be displayed on the publisher's content. Other potential participants include advertising agencies that help generate and place the ad copy, an ad server which technologically delivers the ad and tracks statistics, and advertising affiliates who do independent promotional work for the advertiser.

In 2016, Internet advertising revenues in the United States surpassed those of cable television e broadcast television. In 2017, Internet advertising revenues in the United States totaled $83.0 billion, a 14% increase over the $72.50 billion in revenues in 2016. And research estimates for 2019's online advertising spend put it at $125.2 billion in the United States, some $54.8 billion higher than the spend on television ($70.4 billion).

Many common online advertising practices are controversial and, as a result, have become increasingly subject to regulation. Many internet users also find online advertising disruptive and have increasingly turned to ad blocking for a variety of reasons. Online ad revenues also may not adequately replace other publishers' revenue streams. Declining ad revenue has led some publishers to place their content behind paywalls.

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