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Yes, as in any case, you'll always adapt any SEO rules or guidance to your situation!

Target keywords are keywords that best fit your SEO scenario, both qualitatively and quantitatively.  In other words, what keywords are relevant, and possess metrics that match your needs (volume, difficulty, conversion rate, organic click-through rate, etc.).  This will depend on your site, but for more help on target keywords, you can check out this course:  https://academy.moz.com/keyword-research

Thank you, and good luck!

Hey there!  It sounds like you're on the right track.  I suggest using Keyword Explorer in the following way for each subtopic (I'll use D-Day landings as an example:

1. Search your main keyword (D-Day landings) in Keyword Explorer (KWE).
2. Click on Keyword Suggestions
3. Look for words, questions, phrases, etc. that are relevant to your site and your audience that are related to D-Day landings, and select them to create a Keyword List
4. Add at least 100 D-Day related keywords to that Keyword List
5. Once the list is created and populated with data, use the metrics to identify your target keywords.  Depending on your site, you may be looking for a low difficulty (under 15) or a high volume (if you have a high Domain Authority).
6. Create content around that subtopic.

Re - "How many keywords?"  There's really no hard and fast answer here. The number can be as low as 1 or as high as 15 or 20. You need to know which keywords have actual relevance to the page content.  Remember, focus on topic and concept not the number of keywords. The safe and generally effective bet is to choose one primary keyword that's specific and relevant to a page, with a decent monthly search volume, and then back it up with a few secondary keywords that are also very relevant.

We go into more detail on comprehensive keyword research in the Moz Academy Keyword Research course! https://academy.moz.com/keyword-research

Hey there!  Melissa here, from the Learning Team.

The number of keywords that goes in each cell correlates to the number of keywords you're optimizing a page for.

You might ask yourself, "Well, how many keywords should I target per page?"  Unfortunately, there's really no hard and fast answer here. The number can be as low as 1 or as high as 15 or 20. You need to know which keywords have actual relevance to the page content, and it can get a bit tricky. Remember, focus on topic and concept, because that's what aligns with the Google Hummingbird update. The safe and generally effective bet is to choose one primary keyword that's specific and relevant to a page, with a decent monthly search volume, and then back it up with a few secondary keywords that are also very relevant, but aren't your primary keyword and may not have as high of a search volume.

Hey there!  Melissa here, from the Learning Team.

The number of keywords that goes in each cell correlates to the number of keywords you're optimizing a page for.

You might ask yourself, "Well, how many keywords should I target per page?"  Unfortunately, there's really no hard and fast answer here. The number can be as low as 1 or as high as 15 or 20. You need to know which keywords have actual relevance to the page content, and it can get a bit tricky. Remember, focus on topic and concept, because that's what aligns with the Google Hummingbird update. The safe and generally effective bet is to choose one primary keyword that's specific and relevant to a page, with a decent monthly search volume, and then back it up with a few secondary keywords that are also very relevant, but aren't your primary keyword and may not have as high of a search volume.

Hey there!  It sounds like you're on the right track.  I suggest using Keyword Explorer in the following way for each subtopic (I'll use D-Day landings as an example:

1. Search your main keyword (D-Day landings) in Keyword Explorer (KWE).
2. Click on Keyword Suggestions
3. Look for words, questions, phrases, etc. that are relevant to your site and your audience that are related to D-Day landings, and select them to create a Keyword List
4. Add at least 100 D-Day related keywords to that Keyword List
5. Once the list is created and populated with data, use the metrics to identify your target keywords.  Depending on your site, you may be looking for a low difficulty (under 15) or a high volume (if you have a high Domain Authority).
6. Create content around that subtopic.

Re - "How many keywords?"  There's really no hard and fast answer here. The number can be as low as 1 or as high as 15 or 20. You need to know which keywords have actual relevance to the page content.  Remember, focus on topic and concept not the number of keywords. The safe and generally effective bet is to choose one primary keyword that's specific and relevant to a page, with a decent monthly search volume, and then back it up with a few secondary keywords that are also very relevant.

We go into more detail on comprehensive keyword research in the Moz Academy Keyword Research course! https://academy.moz.com/keyword-research