While there are several HTML tagging techniques that improve a page’s Google SEO results, creating relevant page content is still the best way to rank high. A big part of content creation is your use of targeted keywords. You should include important keywords in your first 50 words, since early placement can be a signal of relevance. And while you should never repeat keywords too often at the expense of good writing, you should repeat keywords in your content two or three times for short pages and four to six times for longer pages. Also, you may wish to use some keyword variation in your content – such as splitting keywords up – as this could potentially improve your ranking.
The first one is pretty powerful and pretty awesome, which is investing in demand generation, rather than just demand serving, but demand generation for brand and branded product names. Why does this work? Well, because let's say, for example, I'm searching for SEO tools. What do I get? I get back a list of results from Google with a bunch of mostly articles saying these are the top SEO tools. In fact, Google has now made a little one box, card-style list result up at the top, the carousel that shows different brands of SEO tools. I don't think Moz is actually listed in there because I think they're pulling from the second or the third lists instead of the first one. Whatever the case, frustrating, hard to optimize for. Google could take away demand from it or click-through rate opportunity from it.

This is one of the more apparent benefits of organic search traffic. If your website ranks for a relevant keyword, you’ll enjoy regular targeted traffic. This consistent flow of traffic will open the floodgates for new leads and customers. That alone is a sweet deal. But here’s the thing about an organic audience: You have no choice but to create a rich content experience.
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:
PPC (paid search marketing): PPC (pay per click) advertising involves paying to have search engines display your website offer in or alongside search results. For example, Google's Adwords program will display your ad at the top or right side of the search results page (placement depends on many factors including keywords and quality of ad). Google will also feed your ads to websites running its Adsense program. There are other types of PPC marketing, such as Facebook Ads. In PPC advertising, you pay each time someone clicks on your offer. Paid search differs from organize search in that you're paying to have your website or offer displayed higher in search results.
In addition to helping you find keywords you should be bidding on, thorough keyword research can also help you identify negative keywords – search terms that you should exclude from your campaigns. Negative keywords aren’t terms with negative connotations, but rather irrelevant terms that are highly unlikely to result in conversions. For example, if you sell ice cream, you might want to exclude the keyword “ice cream recipes”, as users searching for ice cream recipes are unlikely to be in the market for your product.
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.