Yes Offcourse getting SEO Service Done for your website is very much useful and you should start SEO on priority basis. the more you invest on SEO of your Wbeiste the probablity of getting more business increases hence you should keep it on regular basis.
The Monthly SEO budget fully depends on your Pocket and the number of keyword you want to target, the more number of keyword you want to target the monthly cost of the website will increse and the digital marketing company like us can suggest you the Monthly target of Keyword
No, we will not create for your website we will add Meta content all over the website and some time if there is needed we usually create content for targeted page & the word limit per page is 400 Per page. But the decision of creating content depend on us only you can not force us to do it. OGEN being Best Content Writing Service provide take suggestion from it's SEO Experts while auditing the Website and will create content after if they suggest.
Yes we always keep close eye on each and every update which is done by Google Team Directly or indirectly, even we have seperate Research Team who used to follow SEO Journal and Search Engine official Website to maintain the gap.