Context Advertising Optimization

Task: Optimizing contextual advertising to the beginning of the season (September-October). The product is furniture.
Work: Analysis of old campaigns, new groups created announced, extended list of minus words, added doping links, addresses, telephones.
The result: Coeff.conversion growth by 98%
Unfortunately, due to technical problems, transactions were not considered before the start of the project. It is not possible to compare the optimization period with the preceding period. I was compared to the same period last year.