Keyword difficulty is a number that lets you know how difficult it will be to rank for a certain keyword. The higher the number, the more difficult it will be to rank on that keyword. There are a few sites online that will tell you keyword difficulty of a word or phrase. Record these numbers in your Excel document or Google Sheet that you made earlier.
Facebook Ads and other social media ad platforms, for example, are pay-per-click platforms that do not fall under the SEM category. Instead of showing your ads to people who are searching for similar content like search ads do, social media sites introduce your product to people who happen to be just browsing through their feeds. These are two very, very different types of online advertising.

For our client: We took the top PPC terms based on conversion and worked these keywords into existing pages on the website. We also created new high-quality content-based pages from these conversion terms. This type of strategy can work very well in assisting overall conversions on the website and driving more revenue. We also conducted a large-scale keyword research project for the client which yielded in uncovering many areas of opportunity for content development and targeting. 
To drive instant traffic to your website: Unlike organic social marketing, paid social ads instantly deliver results. The moment your ad goes live on social channels, you will get to see a large number of visitors on your web pages. Paid social ads are therefore ideal when you are planning to make a new announcement or if you are launching a new product/service for your brand.
Social is no longer just about conversation and content; it’s now an established channel for customer acquisition, remarketing and engaging existing fans/customers to support retention programs. It may be relatively immature compared to search and email marketing but it’s a channel in which most ecommerce teams are ramping up investment (people and tools).
Facebook Ads and other social media ad platforms, for example, are pay-per-click platforms that do not fall under the SEM category. Instead of showing your ads to people who are searching for similar content like search ads do, social media sites introduce your product to people who happen to be just browsing through their feeds. These are two very, very different types of online advertising.

For our client: We rolled out a successful implementation of rel="author" for the three in-house content writers the company had. The client had over 300+ articles made by these content writers over the years and it was possible to implement rel="author" for all the aged articles. I advise anyone who has a large section of content to do so as it will only benefit the website. We were also in the process of rolling out further schema markup to the site's course content as it only has a benefit for CTR.
A good example is Facebook Custom Audiences. Within this Facebook supports email targeting, the ability to upload customer email addresses and then target those users on Facebook with tailored ads. This lets you micro-segment based on your existing customer database. One application is customer loyalty marketing, promoting offers to existing high value users via Facebook ads.
Remember when you used to rely solely on search engines for traffic? Remember when you worked on SEO and lived and died by your placement in Google? Were you #1? Assured success. Well, okay, maybe not assured. Success only came if the keywords were relevant to your site users, but it was the only real roadmap to generating site traffic and revenue.
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