In On page Optimization, which factors are most important

In On page Optimization, which factors are most important for doing SEO for any website.

Top 5 Off Page SEO Steps,

1. Meta Tags
2. Content
3. Internal Linking
4. Robots Txt
5. Sitemap

Important On page techniques:

1. Keyword Research
2. URL structure
3. Meta tags
4. Content optimization
5. Sitemap and Robots creation
6. Use header tags and Alt tags
7. Create htaccess

The most important On-Page SEO Steps,

1. Meta Tag creation and Optimization
2. Quality Content creation and optimization
3. Structural Internal linking
4. Sitemap (XML, HTML)
5. Robots Txt

Make sure redirections to your website everything with www.
XML site map and HTML sitemaps.
Create Update robots.txt.
Write relevant Meta tags (Title and Description only) for each page.
Use keywords should be in title.
Write Header tags H1, h2, h3 primarily.
Update ALT tags to all images.
Give internal linking to relevant long tail keywords.
Create blog snippet on home page footer.
Put copyrights note in footer.
Use schema code for all images and videos.
Create videos-sitemap.xml and submit in Google webmaster tools.
Update contact address and phone number
Make your site in responsive design
Improve your page speed between 3 to 4 seconds

On-Page Search Engine Optimisation
1. Page Titles
Your page titles are one of the most important SEO factors on your site. Each of your pages & posts should have its own unique title, which includes the main keywords for that page.
For example, you could write a blog post about a new chocolate cake recipe that you have tried. It is therefore vitally important that you include ‘Chocolate Cake Recipe’ within your post title, perhaps “Easy Chocolate Cake Recipe” or “ Chocolate Cake Recipe for kids”, etc.
This way, whenever someone searches for Chocolate Cake Recipes in a search engine, your post has a better chance of showing up because you have included those keywords.
2. Meta Descriptions
Many people forget to include meta descriptions for their pages. These descriptions are an important place to include relevant keywords for your content, as these are used within the search results when your page is listed.
For instance, if we continue to use the ‘Chocolate Cake Recipe’ example, then a good meta description for that page would include those keywords and related ones. So, “This easy chocolate cake recipe is possibly the most delicious, mouth watering, chocolatey cake ever made.” would be a great meta description to use, as it is relatively short, whilst containing a number of specific keywords.
3. Meta Tags
For each of your pages, you can include a set of keywords in the form of meta tags. These should be all the relevant keywords of your content, which you will have researched previously.
I use a WordPress plug-in on my sites called ‘All In One SEO Pack’. This allows me to enter all of my meta tag keywords, meta description and page title at the bottom of each of my posts before publishing. This simply inserts all of the information into your page HTML format for you, making your life a little easier.