Decrease your homepage size by showing less blog posts upfront
Note: Depending on your WordPress theme, the steps below might vary slightly. Additionally, it might be the case that you are not currently displaying blog posts on your homepage or your theme does not allow changing this setting. If that is the case there is no gain in following this procedure—just skip to the next section of this Article.
1. On your browser, login to your WordPress Admin Panel.
2. On the sidebar click “Settings” → “Reading”
3. Locate the field “Blog pages show at most” and edit its value. The fewer blog posts you are showing on the front page the faster your page will load, but your readers will also have to use pagination, or your homepage links to find your blog posts.
Taking this into consideration lower the value to one that you feel comfortable with. 
Auditing your WordPress Plugins
Note: This step should be performed not only for performance reasons but also for security reasons. Ideally, you will want to perform this audit at least every 3 months.
1. On your browser, login to your WordPress Admin Panel.
2. On the sidebar click “Plugins”
3. Filter by “Active” by clicking on the link on the top:
Note: If you have inactive plugins that you are not using and do not expect to use in the future, you should delete them for security reasons.
4. Scroll down the list and look out for plugins that you are sure you are not using anymore, or that you could remove without affecting your website core features. When you find those, tick the box on the left.
Note: Make sure that you fully recognize the plugin and what it does before checking it. If you are not sure, ask your developer or website administrator about it.
5. Once you have selected all the plugins that you are not using anymore, head over to the top, click the drop-down “Bulk Actions” → Select “Deactivate” → Click “Apply”.
6. After you have deactivated the plugins that you are not using anymore, scroll down the “Active” list and look out for outdated plugins. Those will be marked by a beige background with a prompt to update to the most recent version. Click “Update Now”.
Note: While not always, the most recent versions usually carry performance improvements. Plugins should also always be kept uptodate for security reasons.
7. On your browser, navigate to your website and open a few pages to make sure everything is still working as intended after the plugin removals and updates. Visit your core pages (sales pages, checkout, forms) and make sure everything is still fully functional.
Note: If you are facing any issue you should first go ahead and reenable any plugins you might have just disabled, that should fix the issue. Isolate which plugin is causing the malfunction by disabling them back one by one and checking when your issue arises again.
Note 2: If, for some reason, reenabling your plugins does not fix your issue you can always restore your website from a backup by following other articles about restoring WordPress website from our Knowledge Base.
Proceed to Next Article - Final Article of WordPress Speed Optimization