No need to tell them the complete recipe of your secret sauce. If they seem to have some knowledge of SEO tools and ask questions about it, you should be prepared to let them know what tools you are using and why. But if they hire you to do SEO, they probably won't Phone Number List, so it's not worth entering into an SEO proposal.
You do not want to be frustrated if you cannot get the right pitch so invest in a good capo. If you are at a stage where you are reviewing an SEO Phone Number List proposal, they should already see your social proof - on your website, in an email, etc.
Don't beat a dead horse. Your SEO Phone Number List proposal is not about you, but they should be.
Again, not about you. Unless you have actual user data otherwise, save it for your "About Us" page. This is just my opinion, but I think it's like someone showing you pictures of their children when you are trying to make an important business decision.
If they want to hire someone to do SEO, they have already decided that SEO is worth it. Part of what they pay you is to be an expert, so you don't have to give them a crash course that will overwhelm them. And as mentioned earlier, if they know SEO Phone Number List (or think they do), it will just seem patronizing.