Affiliate marketing currently lacks industry standards for training and certification. There are some training courses and seminars that result in certifications; however, the acceptance of such certifications is mostly due to the reputation of the individual or company issuing the certification. Affiliate marketing is not commonly taught in universities, and only a few college instructors work with Internet marketers to introduce the subject to students majoring in marketing.[41]
In the past, large affiliates were the mainstay, as catch-all coupon and media sites gave traffic to hundreds or thousands of advertisers. This is not so much the case anymore. With consumers using long-tail keywords and searching for very specific products and services, influencers can leverage their hyper-focused niche for affiliate marketing success. Influencers may not send advertisers huge amounts of traffic, but the audience they do send is credible, targeted, and has higher conversion rates.
Two-tier programs exist in the minority of affiliate programs; most are simply one-tier. Referral programs beyond two-tier resemble multi-level marketing (MLM) or network marketing but are different: Multi-level marketing (MLM) or network marketing associations tend to have more complex commission requirements/qualifications than standard affiliate programs.[citation needed]
A browser extension is a plug-in that extends the functionality of a web browser. Some extensions are authored using web technologies such as HTML, JavaScript, and CSS. Most modern web browsers have a whole slew of third-party extensions available for download. In recent years, there has been a constant rise in the number of malicious browser extensions flooding the web. Malicious browser extensions will often appear to be legitimate as they seem to originate from vendor websites and come with glowing customer reviews.[32] In the case of affiliate marketing, these malicious extensions are often used to redirect a user's browser to send fake clicks to websites that are supposedly part of legitimate affiliate marketing programs. Typically, users are completely unaware this is happening other than their browser performance slowing down. Websites end up paying for fake traffic numbers, and users are unwitting participants in these ad schemes.
El objetivo de la generación de leads no es simplemente obtener un cliente potencial en forma de registro de datos, como en un sorteo. El objetivo real es conseguir un nuevo cliente que esté interesado en el producto X o en el servicio Y, y que esté "listo para la venta". Se trata de un lead cualificado (qualified lead), que muy probablemente se convertirá en un nuevo cliente porque tiene una motivación específica y no quiere ganar nada.

Podemos conseguir leads a través de las diferentes acciones que vayamos planeando, pero no todos estos leads estarán igual de “preparados” para terminar adquiriendo nuestro producto o servicio. El proceso de generación de leads, en el que un desconocido termina convirtiéndose en un cliente dispuesto a comprar, como norma general, tiene que atravesar las siguientes fases:
Click through rates. Once your subscribers have opened your email, are they actually taking the action you need them to take? If you think that you have a low click-through rate, perhaps your body copy is not as effective as it needs to be. Consider the following: Is the copy of your email relevant to the subject line? Did you offer real value to your subscribers in the email? Is your call-to-action clear enough? Is the link easy to find?

Spam is the biggest threat to organic search engines, whose goal is to provide quality search results for keywords or phrases entered by their users. Google's PageRank algorithm update ("BigDaddy") in February 2006—the final stage of Google's major update ("Jagger") that began in mid-summer 2005—specifically targeted spamdexing with great success. This update thus enabled Google to remove a large amount of mostly computer-generated duplicate content from its index.[33]