A great way to make your website mobile friendly is to implement AMP for your site. Previously it was mainly used by publishers; today it is also a platform for e-commerce and advertising. Since autumn 2017, advertisers can implement AMP for their Google Ads landing pages, making them faster. Building AMP pages for your advertising campaigns can have a positive impact on conversion rates, time on page, bounce rates, and more.
Great tips on doing a competitive analysis Zee! I would also add if it is a "local SEO" competitive analysis, you throw in a GMB optimization/completeness and NAP listings quantity/quality (using Moz Local). Also a great free tool for checking how long title tags are when doing the content part of the analysis (and if a search engine will cut it off with the "...") is https://www.portent.com/serp-preview-tool.
The errors in technical SEO are often not obvious, and therefore one of the most popular. Mistakes in robots.txt and 404 pages, pagination and canonical URLs, hreflang tags and 301 redirects, http vs https and www vs non www versions: each of them can seriously spoil all efforts to promote the site. One quality SEO website analysis is enough to solve all the main problems in this part forever.