SEO

Image Alt Tags: Add "Alt" tags for images. Go to media library and click on the image. What I usually do is copy the "Title" and paste it in the "Alt" field.

Compress Images: When uploading images, make sure you run some sort of compression on it. I use https://tinypng.com/. The smaller the total size of the page, the higher your page speed score will be.

Meta Description: You can try and add meta descriptions for all content. Meta descriptions are the short snippet used by google in search results. Safest bet would be to not exceed 155 characters for these desriptions.

Duplicate Content: Make sure there's no duplicate content on the site. Google will penalize you.

Keywords: Don't add keywords to the content - keywords can potentially do more harm, best just to leave it blank.

More SEO

H1 tags: Make sure you only use one H1 tag for each page. If you want to use additional headings, you need to set it as H2 tags. Multiple H1 tags on a single page will have a negative impact on organic rankings.

Redirects: When you change a URL of an existing page, make sure you add in a redirect. This will make sure if an old indexed URL is accessed, it takes you to the updated link instead. Another reason for redirects is to try and keep the ranking positions. Eg. if the old URL is sitting on Google as the first organic result, changed URLs means you might loose the ranking position and move further down the list or even not feature on page 1 anymore.

When URL's are changed, reach out to the Ads team to inform them.

Go to Tools > Redirection.
Source URL = Old URL
Target URL = New URL
Save

Even More SEO

How do you add the tracking code on your backend website?
Go to Settings > Header and Footer. Add your tracking codes under the correct section. There's already some codes there so just add it below.
If this link is not available, check if the "Header and Footer" plugin is set to "active" under "Plugins".

How to minify CSS Script, Improve server response time, Remove render blocking javascript?
There's a caching plugin (W3 Total Cache) installed aready that's assisting with this. If you want to configure it further, i would suggest to get an expert to have a look as this could potentially break the site.

Go to "Performance" in left bar to access.

Also want to mention to reduce load times, make sure the images are compressed. You can look at plugins like Imagify. This should only be an option if the images uploaded is not compressed already (instead of manually compressing and re uploading images).

Meta Robots Tag - How to update & how to de-index?
Go to Setting > Reading. Check the "Search engine visibility" checkbox to set it to "no-index" site wide and click Save.

HTTPS Implementation, Domain setting (www to non www links), URL Characters (Lowercase)?
Reach out to hosting company for this. Your SSL certificate (HTTPS) might expire yearly so reach out to them if this happens.

How to do wildcard redirection?
Look at documentation from the Redirection plugin on how to set it up.