WordPress SEO Plugins can simply improve the SEO of the WordPress site and there are many to choose from. However there are several mistakes that you need to avoid.
Wordpress SEO plugin
Convinced that WordPress SEO Plugins will solve all your SEO Problems
If you aren't getting the results you're hoping for you might think that installing a few WordPress SEO Plugins will solve the problem. Depending on how good (or otherwise) your on page SEO is, this may help but it won't solve any underlying problems.
When the keywords you are targeting are far too competitive nothing will be able to help. The best solution is to undertake more keyword research and find some which can be less competitive.
It could also be that you simply do not have enough backlinks. You need to use a tool like Traffic Travis to look at the competition for your keywords. In case you are matching your competitors for backlinks, look at the external links to ensure that you have not linked to a dubious site. Otherwise, then WordPress SEO Plugins will be able to help improve your onpage SEO which will leverage the effect of the backlinks. Wordpress SEO plugin
Lacking the knowledge of WordPress SEO Plugins
As it is acceptable to install an over-all Plugin like "All In One SEO Pack" and leave the default settings it'll still be beneficial to understand what it does so that the settings may be adjusted as necessary.
Along with other WordPress SEO Plugins which do things automatically it is important to understand what they do otherwise the outcomes can be unexpected and may clash with things you have done manually.
Installing way too many WordPress SEO Plugins
There are lots of WordPress SEO Plugins that similar things and thus should not be installed together. If this type of does happen the outcomes will be unpredictable. When installing a fresh plugin you should be certain that you know what it does and what the benefit will be which does not duplicate area of the functionality of an existing plugin.
Centering on the detail and missing well-known
It is easy to install Plugins that each make your site a bit more search engine friendly and forget that having properly optimized submissions are far more important.
You must have unique content built around a keyword in order that the search engines understand that it is highly relevant to that keyword. Among the options to help with this really is SEOPressor.