Off-page SEO builds a website’s reputation and authority by connecting it to other high-quality websites. Off-page SEO techniques include: link building (acquiring high-quality backlinks) from other websites and managing local listings and directory profiles. When many websites link to a brand’s website, it shows search engines that the brand’s website is trustworthy, reliable, and reputable, which increases its search rankings.

PPC gives you the ability to fix your daily budget depending on how much you’re willing to spend. And since you can start off with a small amount, you don’t have to put a heavy investment at stake before testing the waters. Once you know a certain campaign is giving you a good return on investment, you can ramp up your budget and increase your ad spendings without worrying about incurring losses.
I want you to do some SERP investigation, meaning perform a search query in Google, see what comes back to you, and then figure out from there what Google believes to be relevant to the keywords searches. What does Google think is the content that will answer this searcher's query? You're trying to figure out intent, the type of content that's required, and whatever missing pieces might be there. If you can find holes where, hey, no one is serving this, but I know that people want the answer to it, you might be able to fill that gap and take over that ranking position. Thanks to Gaetano, @gaetano_nyc, for the great suggestion on this one.

One concern we hear frequently is whether it is beneficial or harmful to repeat keywords. In other words, should we vary keywords (dog food, puppy food, and Purina) or repeat keywords (dog food reviews, dog food comparison, and dog food rankings.) The short answer is that the repetition is just fine, as long as the meaning of the phrase as a whole is sufficiently varied. In other words, dog food and dog food online are basically synonymous, and the content that one might expect to find associated with both keywords is the same. However, dog food reviews and dog food comparison indicate somewhat different content and therefore are appropriate to be used in tandem as keywords.

According to the U.S. Commerce Department, consumers spent $453.46 billion on the web for retail purchases in 2017, a 16.0% increase compared with $390.99 billion in 2016. That’s the highest growth rate since 2011, when online sales grew 17.5% over 2010. Forrester predicts that online sales will account for 17% of all US retail sales by 2022. And digital advertising is also growing strongly; According to Strategy Analytics, in 2017 digital advertising was up 12%, accounting for approximately 38% of overall spending on advertising, or $207.44 billion.
Consider how well you know your industry. If you have been in business for a while and already know what your customers want and how to best reach them, you may want to start to build a long-term SEO strategy that will provide value over time. If you aren’t sure how customers and competitors will respond to your offerings or content, you may want to consider an SEM campaign that allows you to test your ideas, products, and services. Use these sites for market research to better understand your target audience and your position in the industry.
Additionally, there are many situations where PPC (a component of SEM) makes more sense than SEO. For example, if you are first launching a site and you want immediate visibility, it is a good idea to create a PPC campaign because it takes less time than SEO, but it would be unwise to strictly work with PPC and not even touch search engine optimization.