The thing about SEO in 2018 is that Google changes its algorithms more than once a day! Reports say that the company changes its algorithms up to 600 times a year. While the majority of those updates consist of smaller changes, among them is the occasional, major update like Hummingbird or Panda that can really wreak havoc with your traffic and search rankings.
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.
Guest blogging and infographic distribution are great ways to attract high quality links. Do not focus on the total number of links. Spend your time focused on quality links, from websites that are highly relevant to your business. If any SEO company tells you that they can rank your website virtually overnight you need to turn around and run away…fast. Google will continue to refresh their Panda, Penguin, and Hummingbird updates, so make sure that you are focusing on quality rather than quantity.
For example, we have seen retailers who produce seasonal items, such as ornaments, based upon data that they are able to find through the Data Cube. This information tells them about the themes and ideas that are popular throughout the year and during their peak selling seasons, helping them to know which items will be the most successful and the optimal names to select.
Well, yes and no. Sure, you can get hit with an algorithm change or penalty that destroys all your traffic. However, if you have good people who know what they are doing, this is not likely to happen, and if it does, it is easy (in most cases) to get your visits back. Panda and Penguin are another story, but if you get hit by those it is typically not accidental.