Whats the On page Activities?

The list of on-page SEO activities are as follows:

Keywords in Title Tag
A unique title for every page
Title length should be between 55 to 65 characters
Brand Name in Title
Keywords in Meta Description
Unique Meta description for every page
Brand Name in Meta Description
Description length should be between 150 to 160 characters
Keywords in H1 and H2 (Heading tags)
Keyword density within content
Unique content on a page basis
Quality content with good length
Images with Alt attribute
URL Struc

Meta Tags(Title and Description)
Heading Tags(H1, H2, H3)
404 Error
Mobile Friendly
URL Optimisation
Broken Links
Image Tags(Alt)
Website Load Speed

Website Structure
Meta Tags( Meta Title and Meta Description)
Heading Tags(H1, H2, H3)
Image Title Tags Alt Tags
Website Loading Speed
404 Error Page Set Up
Mobile Friendly Website
URL Optimization
Broken Links

Use SEO-Friendly URLs. ...
Start Title With Keyword. ...
Add Modifiers To Your Title. ...
Wrap Your Blog Post Title in an H1 Tag. ...
Dazzle with Multimedia. ...
Wrap Subheadings in H2 Tags. ...
Drop Keyword in First 100 Words. ...
Use Responsive Design.

Heading Tags
Meta Tags
website load speed
URL optimization
Brokan link
Image optimaization
Mobile friendly
Interneal link
External link
Image Alt tags
Google Analytics
Google search console
Contant qualitys
Sitemap
robots.txt
301 redirection
404 Error page setup

Meta tags
page speed
HTML and CSS validation
image optimization
URL optimization
mobile friendly pages
Broken links
Canonical Tags
Sitemaps
and much more....

I do not deal with diamonds. Too expensive for my shop. But I am sure there are people who can use Avi's talents.

Canonical Issue Resolve
URL Optimisation
Meta Tag Optimization
Content Quality Check
Internal Link
External Link
Heading Tags Optimization - H1 to H6
Image Optimization
Image Alt Tags Optimization
Website Loading Speed Test
404 Error Page Setup
Mobile-Friendly Test
Broken Links Check

Apple has created two beta versions for the tvOS and they are designed especially for the developers for the testing task. Although it is legal to test the beta, still, the process to download and install it is complex. If you are a developer and are facing a bit of problem, then follow the steps mentioned below:
There is two possible way to install a tvOS beta on the Apple TV:

• Via over the air.
• Via USB-C.

Meta Tags
Heading Tags (H1, H2, H3)
Image Tags(Alt Tag)
Compress CSS and JS
Canonical Issue Resolve
URL Restructure
Mobile Friendly
Content Optimization

Meta Tags(Title and Description)
Heading Tags(H1, H2, H3)
Image Tags(Alt)
Website Load Speed
404 Error
Mobile Friendly
URL Optimisation
Broken Link

Meta Title Optimization
Meta Description Optimization
Content Quality Check
URL Optimisation
Internal Link
External Link
Heading Tags Optimization - H1 to H6
Image Optimization
Image Alt Tags Optimization
Website Loading Speed Test
404 Error Page Setup
Mobile-Friendly Test
Broken Links Check

Most important optimize your website content with your targeted keywords.

Meta Title Optimization
Meta Description Optimization
Content Quality Check
URL Optimisation
Internal Link
External Link
Heading Tags Optimization - H1 to H6
Image Optimization
Image Alt Tags Optimization
Website Loading Speed Test
404 Error Page Setup
Mobile-Friendly Test
Broken Links Check
AND THEN OFF PAGE

Content quality comes first
Page titles and meta descriptions
Content SEO
Headings and content formatting
Images and other multimedia elements
URL optimization
Internal links
External links
Page loading speed
Mobile friendliness
Comments and on-page SEO

Meta Tags
Heading Tags (H1, H2, H3)
Image Tags(Alt Tag)
Website Load Speed optimization
Canonical Issue Resolve
URL Restructure
Mobile Friendly
Content Optimization
Webmaster and Analytics code

Meta content
Pagespeed
Webpage content
Broken links
Sitemap
Robots
Outbound link optimization
Mobile friendly
Alt tag
URL optimization
Redirection
And so on...

Content
Speed
Meta tags
Title Tags
Alt Tags
Header tags
Broken Links
Internal Links
External Links
Mobile Friendly
URL Optimization

Updating Meta Tags
Adding Image Alt
Robots.txt
Sitemap
301 redirection
Broken link redirection
404 redirection.
These are the most important onpage activities among all the others.

Meta Tags(Title and Description)
Heading Tags(H1, H2, H3)
Image Tags(Alt)
Website Load Speed
404 Error
Mobile Friendly
URL Optimisation
Broken Link