There are also a few more similarities. All of these marketing methods are measurable to an extent never seen in any other media. Every click can be measured – where and when it came – and followed through to the conversion, the sale and the lifetime customer value.  This feedback loop creates optimization opportunities that can create huge incremental improvements in your SEM campaigns.
The piece on generating demand for branded queries rather than just product-based ones is particularly interesting here. It sounds as though it'll be more important than ever to have a strong brand in order to succeed (rather than just having a well-optimized site -- and ideally, having the strategic, technical, and creative sides all working together cohesively). Perhaps it's possible that brand exposure through things like answer boxes can still deliver some value too, even if it's difficult to measure, and CTRs are diminished?
While SEO doesn’t guarantee that you will keep receiving traffic on autopilot for a long time, it does give you the peace of mind that doesn’t come with PPC marketing. Once you rank for a particular keyword, you can keep doing the needed on-page SEO to maintain your rank. By being more sustainable, SEO can help you dominate a market segment without burning a hole in the wallet.
AdWords is recognized as a web-based advertising utensil since it adopts keywords which can deliver adverts explicitly to web users looking for information in respect to a certain product or service. It is flexible and provides customizable options like Ad Extensions, access to non-search sites, leveraging the display network to help increase brand awareness. The project hinges on cost per click (CPC) pricing where the maximum cost per day for the campaign can be chosen, thus the payment of the service only applies if the advert has been clicked. SEM companies have embarked on AdWords projects as a way to publicize their SEM and SEO services. One of the most successful approaches to the strategy of this project was to focus on making sure that PPC advertising funds were prudently invested. Moreover, SEM companies have described AdWords as a practical tool for increasing a consumer’s investment earnings on Internet advertising. The use of conversion tracking and Google Analytics tools was deemed to be practical for presenting to clients the performance of their canvas from click to conversion. AdWords project has enabled SEM companies to train their clients on the utensil and delivers better performance to the canvass. The assistance of AdWord canvass could contribute to the growth of web traffic for a number of its consumer’s websites, by as much as 250% in only nine months.[30]
People find their way to your website in many different ways. If someone is already familiar with your business and knows where to find your website, they might just navigate straight to your website by typing in your domain. If someone sees a link to a blog you wrote in their Facebook newsfeed, they might click the link and come to your website that way.
I agree with the point that a small or medium-sized business will have limits for budget and resources in generating brand search, but I wouldn't say that stops them from potentially producing huge growth there if they do something interesting/innovative etc. I can think of quite a few small to medium sized brands that have more name recognition than larger companies in their space. The challenge is that many of those brands are led by people who are very good at generating marketing and publicity - it's harder for small brands to be able to afford to pay for a top level consultant or agency.

In addition to giving you insight into the search volume and competition level of keywords, most keyword research tools will also give you detailed information about the average or current estimated CPC for particular keywords are. This is particularly important for businesses with smaller ad budgets and this feature allows you to predict whether certain keywords will be truly beneficial to your ad campaigns or if they’ll cost too much.
Paid search is a great option for anyone targeting transactional queries. The people behind these types of queries have already researched and decided what they want, and are often one click away from getting their credit cards out. In fact, these “high commercial intent” searches for product or brand-specific keyphrases receive more clicks via paid ads than organic results, by a margin of nearly 2:1 It is worth noting however that 94 per cent of web users prefer organic results to paid results so it is best not to put all of your eggs in one basket.
Search Engine Marketing or SEM encompasses the steps taken to increase relevant traffic to your website, through higher rankings on search engines. Traditional SEM is made up of two processes: “organic” search engine optimization (SEO) and pay-per-click advertising (PPC) (or cost-per-click (CPC)). However, the field of SEM is a changing and expanding field thanks to constant new developments, such as:

The Google, Yahoo!, and Bing search engines insert advertising on their search results pages. The ads are designed to look similar to the search results, though different enough for readers to distinguish between ads and actual results. This is done with various differences in background, text, link colors, and/or placement on the page. However, the appearance of ads on all major search engines is so similar to genuine search results that a majority of search engine users cannot effectively distinguish between the two.[1]
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