Analysis is the key to SEO – Monitoring your ranking on search engines is key to getting better results. Start by tracking the most important website metrics to set a baseline for your performance. Make small content changes and see if you notice a boost in your site traffic or rankings. Avoid making several unrelated changes simultaneously so you can always keep track of what was responsible for improved performance.
SEM search placements include an “Ad” designation. SEO does not. Search results that appear as a result of SEM or SEO look different on SERPs. Paid ads that receive placement through SEM tactics are often identified as an ad (e.g., by an icon appearing next to the placement), whereas the search results that appear as a result of organic SEO are not marked in such manner.
Are you just launching your first website and creating your initial online footprint to promote your product or service? Then you’ll likely need immediate visibility in search until you build up your organic credibility. With a strategic PPC campaign, you'll be able to achieve this. What you shouldn't do, though, is rely strictly on PPC over the long-term while ignoring organic SEO. You still need to create great content that visitors will want to engage with once they get to your website.
Now, some buckets are worth more than others, and the three main buckets that you need to be aware of for search rankings are quality, trust and authority. So quality: what Google is trying to measure when they’re trying to figure out what sites should rank is offering something valuable or unique or interesting to googles searchers. For example: good content—if you are selling t-shirts and you are using the same description that every other t-shirt seller is using on their website then you are not offering anything unique to Google’s searchers.