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.
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.
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If the pages you’ve created don’t rank for the keywords you’ve selected, you should re-evaluate your content strategy and adjust. If your page isn’t generating organic traffic, focus on less competitive keywords. Unfortunately in reality this is pretty common. The good thing is, you’ve collected a lot of actual keyword data at this stage. Adjust your keyword strategy and use this data in your advantage.      
This will instruct search engines to avoid this specific link. The attributes found above helps define the relationship that a page or content has with the link it is tagged with. Nofollow links are mostly used in blogs or forum comment because this deems spammers powerless. This was created to make sure that inserting links is not abused by those who buy links or sell them for their gain. As a webmaster, it is your job to check your pages for these links. Inspect the code and see if the links are tagged with its corresponding follow or nofollow attribute.