On page and OFF page SEO I like to use this SEO tool. This tool helps to find our competitor backlinks and his traffic source. Not Only this you can also analyze that what organic keywords your competitor rank. If you are new to SEO then this tool is very helpful for you this tool suggest you what improvement need on your site. This tool is a good source for finding keywords. By using this tool you can see your competitor keywords and add some additional keywords that you research using this tool and boost up your site within 2 to 3 months easily.
Another feature of Ahrefs that could potentially help you take your campaign to even better heights is their content gap feature. It gives you the option to check which keywords your competitors are ranking for so you can stay one step ahead at all times. Basically speaking, Ahrefs gives SEOs the ability to overtake their competitors through knowing which keywords to target and focus on.