Permalinks – It used to customize your website links
Meta descriptions – Meta description for each page/post makes you to improve your website ranking in the search engine.
Optimize your images – allow search engines to correctly index your images
Use Headings – Use Proper content structure
How to Use Permalinks
Go to Settings -> Permalinks. On this page you can choose the custom structure for your links.
Choose the Custom Structure option and enter /%postname%/. This means it will automatically display the post name as url.
How to use Headings to optimize your WordPress Site
Use the <h1> tag only for the titles of your posts.
Use <h2> tags and <h3> tags as you need for the other headings in your posts. This makes your website ranking in search engine better.
How to optimize your images
Use Title tag and alt tag for all images. It helps to index your website images in search engine.