Can't go wrong with the Google Keyword tool, SEMRush and Google Trends. The Keyword tool for volume estimates, SEMRush to see what keywords competitors are ranking for/targeting, and Google Trends to make sure the traffic is actually coming from countries I'm trying to target. Gives a relatively accurate picture of when to expect traffic spikes and seasonality insight.
Basically, Google shows the autocomplete suggestions whenever you start typing anything into Google search box. It is in Google's best interest to show the most relevant keywords in the autocomplete suggestions. Keywords that would help Google to retrieve the most relevant websites and help users find the most relevant content for their search query.
You can also indicate which pages don't need to be crawled or are not important. You call the Googlebot to crawl and index your site from inside the Google Search Console. However, do note that although Google "looks" at your sitemap - Google is more interested in doing a raw crawl of your site - jumping from one link to another to spider all the pages in its database. By doing that, it also forms a link map of your site into its own index - which tell it which pages on your site are the most important pages (they are the ones that have the most links - the most prominent links).
You can improve your site speed by a ton of methods, but the overall goal should be to test your site from different geo-locations using a tool like pingdom and then attend to issues. You could go for a CDN provider like Cloudflare or install caching plugins that speed up your site by reducing database queries and therefore the server load. Choosing the right hosting company for you is a critical decision and is based on many factors including your CMS, expected site traffic, and what your goals are for the site amongst others.
Search Engine Optimization is just a term that explains how we make our content (like blog posts) easy for search engines to find. We want to put specific words and phrases (keywords!) in our content that match up with the phrases people type into search bars. We also want to put those keywords into places where search engines like to read it. That’s it! Got it? Good job!
SEMrush is a very useful tool for both researching competitors when starting a site or for growing an established site. I really like to find weaker niche sites that still seem to be ranking for lots of keywords; SEMrush helps me see what they are ranking for and what I can potentially target. You can also see what keywords you’re on the cusp of ranking for with your established site - another very useful feature.
3) KWFinder is one of the "newer" kids on the block, but it's probably just about the easiest way I have found to find new long-tail keywords quickly. A couple of things I like about this tool is that it allows me to create lists of keywords. So I can group up my different sites by lists and revisit them at a later date. I can export the data to CSV and start building out campaigns. It also keeps a nice scrolling list of the last 20+ keywords you have looked up. The SEO difficulty indicator comes in very handy as well! As far as ease of use goes, KWFinder wins hands down.
The total number of backlinks and their quality pointing to your complete website result in the overall authority of your domain. The external links that all point to a specific page will help this page to rank in the search engine results (SERPs). The relevance and quality of an external link are very important factors when you like to measure the impact / value of an link. To find out more about quality links have a look at this article on: the Official Google Webmaster Central Blog – https://webmasters.googleblog.com/2010/06/quality-links-to-your-site.html
Negative SEO is basically when someone sends a ton of spammy, low quality backlinks to your site. The goal is to get Google to think your site is low quality because of all the crappy sites linking to you, and eventually devalue your site. There are actual companies that get paid to do negative SEO on behalf of their clients. It sucks, but it's reality.
This is something I’ll admit that I’ve done in the past – just assumed that ‘these are the keywords consumers must be using’, but keyword research tools have shown a plethora of terms that I certainly wouldn’t have managed to come up with, and I agree that as the language of products evolve, we should do regular checks to ensure we’re keeping up with that evolution.